121003321544 has 32 divisors (see below), whose sum is σ = 261671678400. Its totient is φ = 51382797120.

The previous prime is 121003321513. The next prime is 121003321553. The reversal of 121003321544 is 445123300121.

It is a happy 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, 9905702 + ... + 9917909.

It is an arithmetic number, because the mean of its divisors is an integer number (8177239950).

Almost surely, 2^121003321544 is an apocalyptic number.

121003321544 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

121003321544 is an abundant number, since it is smaller than the sum of its proper divisors (140668356856).

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

121003321544 is a wasteful number, since it uses less digits than its factorization.

121003321544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19823733 (or 19823729 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 121003321544 its reverse (445123300121), we get a palindrome (566126621665).

The spelling of 121003321544 in words is "one hundred twenty-one billion, three million, three hundred twenty-one thousand, five hundred forty-four".