101212221200 has 60 divisors (see below), whose sum is σ = 245570007588. Its totient is φ = 40084032000.

The previous prime is 101212221181. The next prime is 101212221233. The reversal of 101212221200 is 2122212101.

It can be written as a sum of positive squares in 6 ways, for example, as 8993108224 + 92219112976 = 94832^2 + 303676^2 .

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, 1212227 + ... + 1293026.

Almost surely, 2^101212221200 is an apocalyptic number.

101212221200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101212221200 is an abundant number, since it is smaller than the sum of its proper divisors (144357786388).

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

101212221200 is a wasteful number, since it uses less digits than its factorization.

101212221200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2505372 (or 2505361 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 101212221200 its reverse (2122212101), we get a palindrome (103334433301).

Subtracting from 101212221200 its reverse (2122212101), we obtain a palindrome (99090009099).

The spelling of 101212221200 in words is "one hundred one billion, two hundred twelve million, two hundred twenty-one thousand, two hundred".