121310331144 has 128 divisors (see below), whose sum is σ = 323569209600. Its totient is φ = 37768273920.

The previous prime is 121310331101. The next prime is 121310331173. The reversal of 121310331144 is 441133013121.

It is a happy number.

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, 42018069 + ... + 42020955.

It is an arithmetic number, because the mean of its divisors is an integer number (2527884450).

Almost surely, 2^121310331144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121310331144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161784604800).

121310331144 is an abundant number, since it is smaller than the sum of its proper divisors (202258878456).

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

121310331144 is a wasteful number, since it uses less digits than its factorization.

121310331144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3663 (or 3659 counting only the distinct ones).

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

Adding to 121310331144 its reverse (441133013121), we get a palindrome (562443344265).

The spelling of 121310331144 in words is "one hundred twenty-one billion, three hundred ten million, three hundred thirty-one thousand, one hundred forty-four".