20212120122021 has 24 divisors (see below), whose sum is σ = 29246541105600. Its totient is φ = 13451093787456.

The previous prime is 20212120122017. The next prime is 20212120122031. The reversal of 20212120122021 is 12022102121202.

It is a happy number.

20212120122021 is a `hidden beast` number, since 202 + 1 + 21 + 201 + 220 + 21 = 666.

It is not a de Polignac number, because 20212120122021 - 2² = 20212120122017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20212120121985 and 20212120122003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212120122031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64930270 + ... + 65240816.

It is an arithmetic number, because the mean of its divisors is an integer number (1218605879400).

Almost surely, 2^{20212120122021} is an apocalyptic number.

It is an amenable number.

20212120122021 is a deficient number, since it is larger than the sum of its proper divisors (9034420983579).

20212120122021 is a wasteful number, since it uses less digits than its factorization.

20212120122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323225 (or 323222 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20212120122021 its reverse (12022102121202), we get a palindrome (32234222243223).

The spelling of 20212120122021 in words is "twenty trillion, two hundred twelve billion, one hundred twenty million, one hundred twenty-two thousand, twenty-one".