101220120200 has 48 divisors (see below), whose sum is σ = 236697188580. Its totient is φ = 40253999360.

The previous prime is 101220120191. The next prime is 101220120227. The reversal of 101220120200 is 2021022101.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 76665856996 + 24554263204 = 276886^2 + 156698^2 .

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, 1428119 + ... + 1497318.

Almost surely, 2^101220120200 is an apocalyptic number.

101220120200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101220120200 is an abundant number, since it is smaller than the sum of its proper divisors (135477068380).

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

101220120200 is a wasteful number, since it uses less digits than its factorization.

101220120200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2925626 (or 2925617 counting only the distinct ones).

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

Adding to 101220120200 its reverse (2021022101), we get a palindrome (103241142301).

The spelling of 101220120200 in words is "one hundred one billion, two hundred twenty million, one hundred twenty thousand, two hundred".