10112001021 has 12 divisors (see below), whose sum is σ = 14770339740. Its totient is φ = 6665588160.

The previous prime is 10112000993. The next prime is 10112001023. The reversal of 10112001021 is 12010021101.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 744471225 + 9367529796 = 27285^2 + 96786^2 .

It is not a de Polignac number, because 10112001021 - 2²³ = 10103612413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 10112000994 and 10112001012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10112001023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6311310 + ... + 6312911.

It is an arithmetic number, because the mean of its divisors is an integer number (1230861645).

Almost surely, 2^10112001021 is an apocalyptic number.

It is an amenable number.

10112001021 is a deficient number, since it is larger than the sum of its proper divisors (4658338719).

10112001021 is a wasteful number, since it uses less digits than its factorization.

10112001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12624316 (or 12624313 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 10112001021 its reverse (12010021101), we get a palindrome (22122022122).

The spelling of 10112001021 in words is "ten billion, one hundred twelve million, one thousand, twenty-one".