20101221020110 has 32 divisors (see below), whose sum is σ = 36196101656064. Its totient is φ = 8037399300000.

The previous prime is 20101221020071. The next prime is 20101221020123. The reversal of 20101221020110 is 1102012210102.

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, 296658735 + ... + 296726485.

It is an arithmetic number, because the mean of its divisors is an integer number (1131128176752).

Almost surely, 2^{20101221020110} is an apocalyptic number.

20101221020110 is a deficient number, since it is larger than the sum of its proper divisors (16094880635954).

20101221020110 is a wasteful number, since it uses less digits than its factorization.

20101221020110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78720.

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

Adding to 20101221020110 its reverse (1102012210102), we get a palindrome (21203233230212).

The spelling of 20101221020110 in words is "twenty trillion, one hundred one billion, two hundred twenty-one million, twenty thousand, one hundred ten".