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912121131103 = 71355756331963
BaseRepresentation
bin11010100010111101010…
…01111111000001011111
310020012100021211100012221
431101132221333001133
5104421011002143403
61535004521210211
7122620132456120
oct15213651770137
93205307740187
10912121131103
11321912666016
12128937630967
1368021a52630
143220b136047
1518ad6727dbd
hexd45ea7f05f

912121131103 has 32 divisors (see below), whose sum is σ = 1126658889216. Its totient is φ = 719080564608.

The previous prime is 912121131059. The next prime is 912121131133. The reversal of 912121131103 is 301131121219.

It is not a de Polignac number, because 912121131103 - 233 = 903531196511 is a prime.

It is a super-2 number, since 2×9121211311032 (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 (912121131133) 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, 28520800 + ... + 28552762.

It is an arithmetic number, because the mean of its divisors is an integer number (35208090288).

Almost surely, 2912121131103 is an apocalyptic number.

912121131103 is a deficient number, since it is larger than the sum of its proper divisors (214537758113).

912121131103 is a wasteful number, since it uses less digits than its factorization.

912121131103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33103.

The product of its (nonzero) digits is 324, while the sum is 25.

The spelling of 912121131103 in words is "nine hundred twelve billion, one hundred twenty-one million, one hundred thirty-one thousand, one hundred three".

Divisors: 1 7 13 91 557 563 3899 3941 7241 7319 31963 50687 51233 223741 313591 415519 2195137 2908633 4076683 17803391 17995169 28536781 124623737 125966183 231444083 233937197 1620108581 1637560379 10023309133 70163163931 130303018729 912121131103