212021222130 has 96 divisors (see below), whose sum is σ = 552722749488. Its totient is φ = 56388710400.

The previous prime is 212021222033. The next prime is 212021222141. The reversal of 212021222130 is 31222120212.

It can be written as a sum of positive squares in 8 ways, for example, as 71335465569 + 140685756561 = 267087^2 + 375081^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 65095462 + ... + 65098718.

Almost surely, 2^212021222130 is an apocalyptic number.

212021222130 is an abundant number, since it is smaller than the sum of its proper divisors (340701527358).

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

212021222130 is a wasteful number, since it uses less digits than its factorization.

212021222130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4972 (or 4969 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 212021222130 its reverse (31222120212), we get a palindrome (243243342342).

The spelling of 212021222130 in words is "two hundred twelve billion, twenty-one million, two hundred twenty-two thousand, one hundred thirty".