1213220323100 has 36 divisors (see below), whose sum is σ = 2747152806384. Its totient is φ = 464188644480.

The previous prime is 1213220323097. The next prime is 1213220323163. The reversal of 1213220323100 is 13230223121.

It is a super-2 number, since 2×1213220323100² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

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, 263741249 + ... + 263745848.

Almost surely, 2^{1213220323100} is an apocalyptic number.

1213220323100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213220323100 is an abundant number, since it is smaller than the sum of its proper divisors (1533932483284).

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

1213220323100 is a wasteful number, since it uses less digits than its factorization.

1213220323100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527487134 (or 527487127 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 1213220323100 its reverse (13230223121), we get a palindrome (1226450546221).

The spelling of 1213220323100 in words is "one trillion, two hundred thirteen billion, two hundred twenty million, three hundred twenty-three thousand, one hundred".