121121212132320 has 96 divisors (see below), whose sum is σ = 381536561105280. Its totient is φ = 32298588387840.

The previous prime is 121121212132313. The next prime is 121121212132331. The reversal of 121121212132320 is 23231212121121.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×121121212132320² (a number of 29 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38130015 + ... + 41184225.

It is an arithmetic number, because the mean of its divisors is an integer number (3974339178180).

Almost surely, 2^{121121212132320} is an apocalyptic number.

121121212132320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121121212132320 is an abundant number, since it is smaller than the sum of its proper divisors (260415348972960).

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

121121212132320 is a wasteful number, since it uses less digits than its factorization.

121121212132320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3136848 (or 3136840 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

Adding to 121121212132320 its reverse (23231212121121), we get a palindrome (144352424253441).

The spelling of 121121212132320 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, two hundred twelve million, one hundred thirty-two thousand, three hundred twenty".