121331122000 has 160 divisors (see below), whose sum is σ = 327495003264. Its totient is φ = 43094016000.

The previous prime is 121331121943. The next prime is 121331122061. The reversal of 121331122000 is 221133121.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

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, 881872 + ... + 1010128.

Almost surely, 2^121331122000 is an apocalyptic number.

121331122000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121331122000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163747501632).

121331122000 is an abundant number, since it is smaller than the sum of its proper divisors (206163881264).

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

121331122000 is a wasteful number, since it uses less digits than its factorization.

121331122000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128334 (or 128318 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 121331122000 its reverse (221133121), we get a palindrome (121552255121).

The spelling of 121331122000 in words is "one hundred twenty-one billion, three hundred thirty-one million, one hundred twenty-two thousand".