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1020202130031 = 371921499118931
BaseRepresentation
bin11101101100010001100…
…10010001101001101111
310121112022122021222000020
432312020302101221233
5113203333221130111
62100401400133223
7133464363011220
oct16661062215157
93545278258006
101020202130031
11363735562227
1214587b767213
13752877c5136
1437541507247
151b81010c906
hexed88c91a6f

1020202130031 has 32 divisors (see below), whose sum is σ = 1636504320000. Its totient is φ = 552259542240.

The previous prime is 1020202129951. The next prime is 1020202130041. The reversal of 1020202130031 is 1300312020201.

It is not a de Polignac number, because 1020202130031 - 211 = 1020202127983 is a prime.

It is a super-2 number, since 2×10202021300312 (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020202130041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8518636 + ... + 8637566.

It is an arithmetic number, because the mean of its divisors is an integer number (51140760000).

Almost surely, 21020202130031 is an apocalyptic number.

1020202130031 is a deficient number, since it is larger than the sum of its proper divisors (616302189969).

1020202130031 is a wasteful number, since it uses less digits than its factorization.

1020202130031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140459.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 1020202130031 its reverse (1300312020201), we get a palindrome (2320514150232).

The spelling of 1020202130031 in words is "one trillion, twenty billion, two hundred two million, one hundred thirty thousand, thirty-one".

Divisors: 1 3 7 19 21 57 133 399 21499 64497 118931 150493 356793 408481 451479 832517 1225443 2259689 2497551 2859367 6779067 8578101 15817823 47453469 2556897569 7670692707 17898282983 48581053811 53694848949 145743161433 340067376677 1020202130031