20212012012021 has 48 divisors (see below), whose sum is σ = 21449724004800. Its totient is φ = 19040204736000.

The previous prime is 20212012012009. The next prime is 20212012012033. The reversal of 20212012012021 is 12021021021202.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20212012012009) and next prime (20212012012033).

It is not a de Polignac number, because 20212012012021 - 2⁹ = 20212012011509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20212012011986 and 20212012012004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212012012051) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2296032406 + ... + 2296041208.

It is an arithmetic number, because the mean of its divisors is an integer number (446869250100).

Almost surely, 2^{20212012012021} is an apocalyptic number.

It is an amenable number.

20212012012021 is a deficient number, since it is larger than the sum of its proper divisors (1237711992779).

20212012012021 is a wasteful number, since it uses less digits than its factorization.

20212012012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9334 (or 9305 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20212012012021 its reverse (12021021021202), we get a palindrome (32233033033223).

The spelling of 20212012012021 in words is "twenty trillion, two hundred twelve billion, twelve million, twelve thousand, twenty-one".