1221361338080 has 48 divisors (see below), whose sum is σ = 3107425101984. Its totient is φ = 450964185600.

The previous prime is 1221361338023. The next prime is 1221361338139. The reversal of 1221361338080 is 808331631221.

It is a super-3 number, since 3×1221361338080³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 293594396 + ... + 293598555.

It is an arithmetic number, because the mean of its divisors is an integer number (64738022958).

Almost surely, 2^{1221361338080} is an apocalyptic number.

1221361338080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221361338080 is an abundant number, since it is smaller than the sum of its proper divisors (1886063763904).

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

1221361338080 is a wasteful number, since it uses less digits than its factorization.

1221361338080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587192979 (or 587192971 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The spelling of 1221361338080 in words is "one trillion, two hundred twenty-one billion, three hundred sixty-one million, three hundred thirty-eight thousand, eighty".