21120121010102 has 32 divisors (see below), whose sum is σ = 33101822610432. Its totient is φ = 10087413919264.

The previous prime is 21120121010101. The next prime is 21120121010143. The reversal of 21120121010102 is 20101012102112.

It is a super-2 number, since 2×21120121010102² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120121010101) 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, 202856303 + ... + 202960389.

It is an arithmetic number, because the mean of its divisors is an integer number (1034431956576).

Almost surely, 2^{21120121010102} is an apocalyptic number.

21120121010102 is a deficient number, since it is larger than the sum of its proper divisors (11981701600330).

21120121010102 is a wasteful number, since it uses less digits than its factorization.

21120121010102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109972.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21120121010102 its reverse (20101012102112), we get a palindrome (41221133112214).

The spelling of 21120121010102 in words is "twenty-one trillion, one hundred twenty billion, one hundred twenty-one million, ten thousand, one hundred two".