100001010111021 has 80 divisors (see below), whose sum is σ = 156317881015296. Its totient is φ = 63589445466624.

The previous prime is 100001010111001. The next prime is 100001010111049. The reversal of 100001010111021 is 120111010100001.

It is not a de Polignac number, because 100001010111021 - 2¹⁵ = 100001010078253 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 = 100001010110994 and 100001010111012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100001010111001) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1656081796 + ... + 1656142178.

Almost surely, 2^{100001010111021} is an apocalyptic number.

It is an amenable number.

100001010111021 is a deficient number, since it is larger than the sum of its proper divisors (56316870904275).

100001010111021 is a wasteful number, since it uses less digits than its factorization.

100001010111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62904 (or 62895 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 100001010111021 its reverse (120111010100001), we get a palindrome (220112020211022).

The spelling of 100001010111021 in words is "one hundred trillion, one billion, ten million, one hundred eleven thousand, twenty-one".