121001321000 has 256 divisors, whose sum is σ = 338442624000. Its totient is φ = 39590707200.

The previous prime is 121001320991. The next prime is 121001321017. The reversal of 121001321000 is 123100121.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 130248536 + ... + 130249464.

It is an arithmetic number, because the mean of its divisors is an integer number (1322041500).

Almost surely, 2^121001321000 is an apocalyptic number.

121001321000 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 121001321000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169221312000).

121001321000 is an abundant number, since it is smaller than the sum of its proper divisors (217441303000).

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

121001321000 is a wasteful number, since it uses less digits than its factorization.

121001321000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1789 (or 1775 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 121001321000 its reverse (123100121), we get a palindrome (121124421121).

The spelling of 121001321000 in words is "one hundred twenty-one billion, one million, three hundred twenty-one thousand".