121310213221320 has 128 divisors (see below), whose sum is σ = 383088209356800. Its totient is φ = 30646524669696.

The previous prime is 121310213221297. The next prime is 121310213221333. The reversal of 121310213221320 is 23122312013121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 500856487 + ... + 501098633.

It is an arithmetic number, because the mean of its divisors is an integer number (2992876635600).

Almost surely, 2^{121310213221320} is an apocalyptic number.

121310213221320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121310213221320 is an abundant number, since it is smaller than the sum of its proper divisors (261777996135480).

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

121310213221320 is a wasteful number, since it uses less digits than its factorization.

121310213221320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461907 (or 461903 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 121310213221320 its reverse (23122312013121), we get a palindrome (144432525234441).

The spelling of 121310213221320 in words is "one hundred twenty-one trillion, three hundred ten billion, two hundred thirteen million, two hundred twenty-one thousand, three hundred twenty".