20021100121110 has 64 divisors (see below), whose sum is σ = 55502343880704. Its totient is φ = 4568094144000.

The previous prime is 20021100121097. The next prime is 20021100121133. The reversal of 20021100121110 is 1112100112002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1784406166 + ... + 1784417385.

It is an arithmetic number, because the mean of its divisors is an integer number (867224123136).

Almost surely, 2^{20021100121110} is an apocalyptic number.

20021100121110 is an abundant number, since it is smaller than the sum of its proper divisors (35481243759594).

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

20021100121110 is a wasteful number, since it uses less digits than its factorization.

20021100121110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3568823589.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20021100121110 its reverse (1112100112002), we get a palindrome (21133200233112).

The spelling of 20021100121110 in words is "twenty trillion, twenty-one billion, one hundred million, one hundred twenty-one thousand, one hundred ten".