20021111202102 has 96 divisors (see below), whose sum is σ = 42146731468800. Its totient is φ = 6333825089280.

The previous prime is 20021111202077. The next prime is 20021111202109. The reversal of 20021111202102 is 20120211112002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021111202109) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1450903399 + ... + 1450917197.

It is an arithmetic number, because the mean of its divisors is an integer number (439028452800).

Almost surely, 2^{20021111202102} is an apocalyptic number.

20021111202102 is an abundant number, since it is smaller than the sum of its proper divisors (22125620266698).

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

20021111202102 is a wasteful number, since it uses less digits than its factorization.

20021111202102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16718 (or 16665 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20021111202102 its reverse (20120211112002), we get a palindrome (40141322314104).

The spelling of 20021111202102 in words is "twenty trillion, twenty-one billion, one hundred eleven million, two hundred two thousand, one hundred two".