21011021200102 has 32 divisors (see below), whose sum is σ = 34618327833600. Its totient is φ = 9519695304768.

The previous prime is 21011021200063. The next prime is 21011021200177. The reversal of 21011021200102 is 20100212011012.

It is a super-2 number, since 2×21011021200102² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56518978 + ... + 56889514.

It is an arithmetic number, because the mean of its divisors is an integer number (1081822744800).

Almost surely, 2^{21011021200102} is an apocalyptic number.

21011021200102 is a deficient number, since it is larger than the sum of its proper divisors (13607306633498).

21011021200102 is a wasteful number, since it uses less digits than its factorization.

21011021200102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435460.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21011021200102 its reverse (20100212011012), we get a palindrome (41111233211114).

The spelling of 21011021200102 in words is "twenty-one trillion, eleven billion, twenty-one million, two hundred thousand, one hundred two".