212021223202 has 4 divisors (see below), whose sum is σ = 318031834806. Its totient is φ = 106010611600.

The previous prime is 212021223187. The next prime is 212021223257. The reversal of 212021223202 is 202322120212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 111202907841 + 100818315361 = 333471^2 + 317519^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 212021223202.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53005305799 + ... + 53005305802.

Almost surely, 2^212021223202 is an apocalyptic number.

212021223202 is a deficient number, since it is larger than the sum of its proper divisors (106010611604).

212021223202 is a wasteful number, since it uses less digits than its factorization.

212021223202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106010611603.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 212021223202 its reverse (202322120212), we get a palindrome (414343343414).

The spelling of 212021223202 in words is "two hundred twelve billion, twenty-one million, two hundred twenty-three thousand, two hundred two".