20120220121111 has 16 divisors (see below), whose sum is σ = 22542764849568. Its totient is φ = 17796590179200.

The previous prime is 20120220121097. The next prime is 20120220121189. The reversal of 20120220121111 is 11112102202102.

It is a cyclic number.

It is not a de Polignac number, because 20120220121111 - 2³⁷ = 19982781167639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120220121511) 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, 71040121 + ... + 71322781.

It is an arithmetic number, because the mean of its divisors is an integer number (1408922803098).

Almost surely, 2^{20120220121111} is an apocalyptic number.

20120220121111 is a deficient number, since it is larger than the sum of its proper divisors (2422544728457).

20120220121111 is a wasteful number, since it uses less digits than its factorization.

20120220121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457602.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20120220121111 its reverse (11112102202102), we get a palindrome (31232322323213).

The spelling of 20120220121111 in words is "twenty trillion, one hundred twenty billion, two hundred twenty million, one hundred twenty-one thousand, one hundred eleven".