21120020202102 has 32 divisors (see below), whose sum is σ = 43346213433600. Its totient is φ = 6856582793760.

The previous prime is 21120020202049. The next prime is 21120020202131. The reversal of 21120020202102 is 20120202002112.

It is a super-3 number, since 3×21120020202102³ (a number of 41 digits) contains 333 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, 117188674 + ... + 117368757.

It is an arithmetic number, because the mean of its divisors is an integer number (1354569169800).

Almost surely, 2^{21120020202102} is an apocalyptic number.

21120020202102 is an abundant number, since it is smaller than the sum of its proper divisors (22226193231498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21120020202102 is a wasteful number, since it uses less digits than its factorization.

21120020202102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234557828.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21120020202102 its reverse (20120202002112), we get a palindrome (41240222204214).

The spelling of 21120020202102 in words is "twenty-one trillion, one hundred twenty billion, twenty million, two hundred two thousand, one hundred two".