1213100221125 has 96 divisors (see below), whose sum is σ = 2272506163200. Its totient is φ = 571251331200.

The previous prime is 1213100221093. The next prime is 1213100221139. The reversal of 1213100221125 is 5211220013121.

It is not a de Polignac number, because 1213100221125 - 2⁵ = 1213100221093 is a prime.

It is a super-2 number, since 2×1213100221125² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2343676 + ... + 2814074.

It is an arithmetic number, because the mean of its divisors is an integer number (23671939200).

Almost surely, 2^{1213100221125} is an apocalyptic number.

1213100221125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1213100221125 is a deficient number, since it is larger than the sum of its proper divisors (1059405942075).

1213100221125 is a wasteful number, since it uses less digits than its factorization.

1213100221125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470476 (or 470443 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 21.

Adding to 1213100221125 its reverse (5211220013121), we get a palindrome (6424320234246).

The spelling of 1213100221125 in words is "one trillion, two hundred thirteen billion, one hundred million, two hundred twenty-one thousand, one hundred twenty-five".