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2111013021 = 313217924841
BaseRepresentation
bin111110111010011…
…1000000010011101
312110010020120110110
41331310320002131
513310404404041
6545250200233
7103212212625
oct17564700235
95403216413
102111013021
11993680367
124aab83079
13278475840
14160515885
15c54e0516
hex7dd3809d

2111013021 has 16 divisors (see below), whose sum is σ = 3032711360. Its totient is φ = 1298436480.

The previous prime is 2111013007. The next prime is 2111013041. The reversal of 2111013021 is 1203101112.

It is not a de Polignac number, because 2111013021 - 29 = 2111012509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111012988 and 2111013006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111013041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72561 + ... + 97401.

It is an arithmetic number, because the mean of its divisors is an integer number (189544460).

Almost surely, 22111013021 is an apocalyptic number.

It is an amenable number.

2111013021 is a deficient number, since it is larger than the sum of its proper divisors (921698339).

2111013021 is a wasteful number, since it uses less digits than its factorization.

2111013021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27036.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 2111013021 is about 45945.7617305449. The cubic root of 2111013021 is about 1282.8138417019.

Adding to 2111013021 its reverse (1203101112), we get a palindrome (3314114133).

The spelling of 2111013021 in words is "two billion, one hundred eleven million, thirteen thousand, twenty-one".

Divisors: 1 3 13 39 2179 6537 24841 28327 74523 84981 322933 968799 54128539 162385617 703671007 2111013021