100021304103521 has 16 divisors (see below), whose sum is σ = 104693483596800. Its totient is φ = 95376308681808.

The previous prime is 100021304103451. The next prime is 100021304103533. The reversal of 100021304103521 is 125301403120001.

It is a cyclic number.

It is not a de Polignac number, because 100021304103521 - 2¹⁴ = 100021304087137 is a prime.

It is a super-2 number, since 2×100021304103521² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100021304103221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16361420 + ... + 21627266.

It is an arithmetic number, because the mean of its divisors is an integer number (6543342724800).

Almost surely, 2^{100021304103521} is an apocalyptic number.

It is an amenable number.

100021304103521 is a deficient number, since it is larger than the sum of its proper divisors (4672179493279).

100021304103521 is a wasteful number, since it uses less digits than its factorization.

100021304103521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5268428.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 100021304103521 its reverse (125301403120001), we get a palindrome (225322707223522).

The spelling of 100021304103521 in words is "one hundred trillion, twenty-one billion, three hundred four million, one hundred three thousand, five hundred twenty-one".