122200121000 has 64 divisors (see below), whose sum is σ = 288479065680. Its totient is φ = 48447436800.

The previous prime is 122200120967. The next prime is 122200121009. The reversal of 122200121000 is 121002221.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 249703204 + 121950417796 = 15802^2 + 349214^2 .

It is not an unprimeable number, because it can be changed into a prime (122200121009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 427709 + ... + 653708.

Almost surely, 2^122200121000 is an apocalyptic number.

122200121000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122200121000 is an abundant number, since it is smaller than the sum of its proper divisors (166278944680).

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

122200121000 is a wasteful number, since it uses less digits than its factorization.

122200121000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081551 (or 1081537 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 122200121000 its reverse (121002221), we get a palindrome (122321123221).

The spelling of 122200121000 in words is "one hundred twenty-two billion, two hundred million, one hundred twenty-one thousand".