22212210402 has 24 divisors (see below), whose sum is σ = 48131893836. Its totient is φ = 7403233536.

The previous prime is 22212210373. The next prime is 22212210431. The reversal of 22212210402 is 20401221222.

22212210402 is a `hidden beast` number, since 22 + 21 + 221 + 0 + 402 = 666.

It is an interprime number because it is at equal distance from previous prime (22212210373) and next prime (22212210431).

It can be written as a sum of positive squares in 2 ways, for example, as 19407554721 + 2804655681 = 139311^2 + 52959^2 .

It is a super-3 number, since 3×22212210402³ (a number of 32 digits) contains 333 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105978 + ... + 235914.

Almost surely, 2^22212210402 is an apocalyptic number.

22212210402 is an abundant number, since it is smaller than the sum of its proper divisors (25919683434).

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

22212210402 is a wasteful number, since it uses less digits than its factorization.

22212210402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139442 (or 139439 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 22212210402 its reverse (20401221222), we get a palindrome (42613431624).

The spelling of 22212210402 in words is "twenty-two billion, two hundred twelve million, two hundred ten thousand, four hundred two".