20212212201021 has 96 divisors (see below), whose sum is σ = 33186343956480. Its totient is φ = 11789863113600.

The previous prime is 20212212201007. The next prime is 20212212201023. The reversal of 20212212201021 is 12010221221202.

It is a happy number.

20212212201021 is a `hidden beast` number, since 20 + 212 + 212 + 201 + 0 + 21 = 666.

It is not a de Polignac number, because 20212212201021 - 2⁵ = 20212212200989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20212212200985 and 20212212201003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212212201023) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 18533116 + ... + 19593386.

It is an arithmetic number, because the mean of its divisors is an integer number (345691082880).

Almost surely, 2^{20212212201021} is an apocalyptic number.

It is an amenable number.

20212212201021 is a deficient number, since it is larger than the sum of its proper divisors (12974131755459).

20212212201021 is a wasteful number, since it uses less digits than its factorization.

20212212201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060487 (or 1060484 counting only the distinct ones).

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

Adding to 20212212201021 its reverse (12010221221202), we get a palindrome (32222433422223).

The spelling of 20212212201021 in words is "twenty trillion, two hundred twelve billion, two hundred twelve million, two hundred one thousand, twenty-one".