1213020232100 has 36 divisors (see below), whose sum is σ = 2787092372484. Its totient is φ = 456666439680.

The previous prime is 1213020232091. The next prime is 1213020232187. The reversal of 1213020232100 is 12320203121.

It can be written as a sum of positive squares in 6 ways, for example, as 20835767716 + 1192184464384 = 144346^2 + 1091872^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

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, 356768957 + ... + 356772356.

It is an arithmetic number, because the mean of its divisors is an integer number (77419232569).

Almost surely, 2^{1213020232100} is an apocalyptic number.

1213020232100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213020232100 is an abundant number, since it is smaller than the sum of its proper divisors (1574072140384).

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

1213020232100 is a wasteful number, since it uses less digits than its factorization.

1213020232100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713541344 (or 713541337 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 1213020232100 its reverse (12320203121), we get a palindrome (1225340435221).

The spelling of 1213020232100 in words is "one trillion, two hundred thirteen billion, twenty million, two hundred thirty-two thousand, one hundred".