20122222002021 has 12 divisors (see below), whose sum is σ = 29233440059148. Its totient is φ = 13337272385664.

The previous prime is 20122222001989. The next prime is 20122222002031. The reversal of 20122222002021 is 12020022222102.

20122222002021 is a `hidden beast` number, since 20 + 1 + 222 + 220 + 0 + 202 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10860023657025 + 9262198344996 = 3295455^2 + 3043386^2 .

It is not a de Polignac number, because 20122222002021 - 2⁵ = 20122222001989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20122222001985 and 20122222002003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122222002031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6461855220 + ... + 6461858333.

It is an arithmetic number, because the mean of its divisors is an integer number (2436120004929).

Almost surely, 2^{20122222002021} is an apocalyptic number.

It is an amenable number.

20122222002021 is a deficient number, since it is larger than the sum of its proper divisors (9111218057127).

20122222002021 is a wasteful number, since it uses less digits than its factorization.

20122222002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12923713732 (or 12923713729 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 20122222002021 its reverse (12020022222102), we get a palindrome (32142244224123).

The spelling of 20122222002021 in words is "twenty trillion, one hundred twenty-two billion, two hundred twenty-two million, two thousand, twenty-one".