100010111021 has 4 divisors (see below), whose sum is σ = 100142225532. Its totient is φ = 99877996512.

The previous prime is 100010110961. The next prime is 100010111029. The reversal of 100010111021 is 120111010001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43123090921 + 56887020100 = 207661^2 + 238510^2 .

It is a cyclic number.

It is not a de Polignac number, because 100010111021 - 2⁶ = 100010110957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100010111029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66056120 + ... + 66057633.

It is an arithmetic number, because the mean of its divisors is an integer number (25035556383).

Almost surely, 2^100010111021 is an apocalyptic number.

It is an amenable number.

100010111021 is a deficient number, since it is larger than the sum of its proper divisors (132114511).

100010111021 is an equidigital number, since it uses as much as digits as its factorization.

100010111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132114510.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 100010111021 its reverse (120111010001), we get a palindrome (220121121022).

The spelling of 100010111021 in words is "one hundred billion, ten million, one hundred eleven thousand, twenty-one".