1231221313300 has 72 divisors (see below), whose sum is σ = 2915111545920. Its totient is φ = 447643891200.

The previous prime is 1231221313297. The next prime is 1231221313319. The reversal of 1231221313300 is 33131221321.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6906892 + ... + 7082908.

It is an arithmetic number, because the mean of its divisors is an integer number (40487660360).

Almost surely, 2^{1231221313300} is an apocalyptic number.

1231221313300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231221313300 is an abundant number, since it is smaller than the sum of its proper divisors (1683890232620).

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

1231221313300 is a wasteful number, since it uses less digits than its factorization.

1231221313300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182401 (or 182394 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 1231221313300 its reverse (33131221321), we get a palindrome (1264352534621).

The spelling of 1231221313300 in words is "one trillion, two hundred thirty-one billion, two hundred twenty-one million, three hundred thirteen thousand, three hundred".