22121200170 has 64 divisors (see below), whose sum is σ = 59598080640. Its totient is φ = 5838165504.

The previous prime is 22121200169. The next prime is 22121200181. The reversal of 22121200170 is 7100212122.

It is a happy number.

It is a super-2 number, since 2×22121200170² (a number of 21 digits) contains 22 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 31 ways as a sum of consecutive naturals, for example, 396132 + ... + 448511.

It is an arithmetic number, because the mean of its divisors is an integer number (931220010).

Almost surely, 2^22121200170 is an apocalyptic number.

22121200170 is an abundant number, since it is smaller than the sum of its proper divisors (37476880470).

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

22121200170 is a wasteful number, since it uses less digits than its factorization.

22121200170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844756 (or 844750 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

Adding to 22121200170 its reverse (7100212122), we get a palindrome (29221412292).

The spelling of 22121200170 in words is "twenty-two billion, one hundred twenty-one million, two hundred thousand, one hundred seventy".