201220212122 has 32 divisors (see below), whose sum is σ = 325309049424. Its totient is φ = 93000499200.

The previous prime is 201220212103. The next prime is 201220212191. The reversal of 201220212122 is 221212022102.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 41972126641 + 159248085481 = 204871^2 + 399059^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 201220212122.

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, 1323722 + ... + 1467882.

Almost surely, 2^201220212122 is an apocalyptic number.

201220212122 is a deficient number, since it is larger than the sum of its proper divisors (124088837302).

201220212122 is a wasteful number, since it uses less digits than its factorization.

201220212122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144914.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 201220212122 its reverse (221212022102), we get a palindrome (422432234224).

The spelling of 201220212122 in words is "two hundred one billion, two hundred twenty million, two hundred twelve thousand, one hundred twenty-two".