20110120121 has 16 divisors (see below), whose sum is σ = 24754800000. Its totient is φ = 15908807808.

The previous prime is 20110120091. The next prime is 20110120133. The reversal of 20110120121 is 12102101102.

It is a cyclic number.

It is not a de Polignac number, because 20110120121 - 2¹⁰ = 20110119097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20110120141) 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, 753005 + ... + 779253.

It is an arithmetic number, because the mean of its divisors is an integer number (1547175000).

Almost surely, 2^20110120121 is an apocalyptic number.

It is an amenable number.

20110120121 is a deficient number, since it is larger than the sum of its proper divisors (4644679879).

20110120121 is a wasteful number, since it uses less digits than its factorization.

20110120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34688.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20110120121 its reverse (12102101102), we get a palindrome (32212221223).

The spelling of 20110120121 in words is "twenty billion, one hundred ten million, one hundred twenty thousand, one hundred twenty-one".