20011202200021 has 16 divisors (see below), whose sum is σ = 20286213107328. Its totient is φ = 19737005875200.

The previous prime is 20011202200019. The next prime is 20011202200051. The reversal of 20011202200021 is 12000220211002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20011202200021 - 2¹ = 20011202200019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20011202199974 and 20011202200010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011202200051) 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, 651242560 + ... + 651273286.

It is an arithmetic number, because the mean of its divisors is an integer number (1267888319208).

Almost surely, 2^{20011202200021} is an apocalyptic number.

It is an amenable number.

20011202200021 is a deficient number, since it is larger than the sum of its proper divisors (275010907307).

20011202200021 is a wasteful number, since it uses less digits than its factorization.

20011202200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43692.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20011202200021 its reverse (12000220211002), we get a palindrome (32011422411023).

The spelling of 20011202200021 in words is "twenty trillion, eleven billion, two hundred two million, two hundred thousand, twenty-one".