212221202142 has 64 divisors (see below), whose sum is σ = 472290027264. Its totient is φ = 63273208320.

The previous prime is 212221202129. The next prime is 212221202251. The reversal of 212221202142 is 241202122212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 491584 + ... + 816147.

It is an arithmetic number, because the mean of its divisors is an integer number (7379531676).

Almost surely, 2^212221202142 is an apocalyptic number.

212221202142 is an abundant number, since it is smaller than the sum of its proper divisors (260068825122).

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

212221202142 is a wasteful number, since it uses less digits than its factorization.

212221202142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1307833.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 212221202142 its reverse (241202122212), we get a palindrome (453423324354).

The spelling of 212221202142 in words is "two hundred twelve billion, two hundred twenty-one million, two hundred two thousand, one hundred forty-two".