20111201202021 has 64 divisors (see below), whose sum is σ = 29713888751616. Its totient is φ = 12046139596800.

The previous prime is 20111201201989. The next prime is 20111201202061. The reversal of 20111201202021 is 12020210211102.

It is not a de Polignac number, because 20111201202021 - 2⁵ = 20111201201989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111201202061) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 25928251 + ... + 26692631.

It is an arithmetic number, because the mean of its divisors is an integer number (464279511744).

Almost surely, 2^{20111201202021} is an apocalyptic number.

It is an amenable number.

20111201202021 is a deficient number, since it is larger than the sum of its proper divisors (9602687549595).

20111201202021 is a wasteful number, since it uses less digits than its factorization.

20111201202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764702.

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

Adding to 20111201202021 its reverse (12020210211102), we get a palindrome (32131411413123).

The spelling of 20111201202021 in words is "twenty trillion, one hundred eleven billion, two hundred one million, two hundred two thousand, twenty-one".