212122021221012 has 48 divisors (see below), whose sum is σ = 566820240250880. Its totient is φ = 60481843528032.

The previous prime is 212122021221007. The next prime is 212122021221031. The reversal of 212122021221012 is 210122120221212.

It is a super-3 number, since 3×212122021221012³ (a number of 44 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 212122021221012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2592630712 + ... + 2592712527.

Almost surely, 2^{212122021221012} is an apocalyptic number.

It is an amenable number.

212122021221012 is an abundant number, since it is smaller than the sum of its proper divisors (354698219029868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212122021221012 is a wasteful number, since it uses less digits than its factorization.

212122021221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5185343740 (or 5185343738 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 212122021221012 its reverse (210122120221212), we get a palindrome (422244141442224).

The spelling of 212122021221012 in words is "two hundred twelve trillion, one hundred twenty-two billion, twenty-one million, two hundred twenty-one thousand, twelve".