121031100000 has 432 divisors, whose sum is σ = 435321825120. Its totient is φ = 31891200000.

The previous prime is 121031099993. The next prime is 121031100013. The reversal of 121031100000 is 1130121.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 80099245 + ... + 80100755.

It is an arithmetic number, because the mean of its divisors is an integer number (1007689410).

Almost surely, 2^121031100000 is an apocalyptic number.

121031100000 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 121031100000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217660912560).

121031100000 is an abundant number, since it is smaller than the sum of its proper divisors (314290725120).

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

121031100000 is an equidigital number, since it uses as much as digits as its factorization.

121031100000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1641 (or 1610 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

Adding to 121031100000 its reverse (1130121), we get a palindrome (121032230121).

The spelling of 121031100000 in words is "one hundred twenty-one billion, thirty-one million, one hundred thousand".