121331013201000 has 384 divisors, whose sum is σ = 422183498124960. Its totient is φ = 31405667328000.

The previous prime is 121331013200987. The next prime is 121331013201043. The reversal of 121331013201000 is 102310133121.

121331013201000 is a `hidden beast` number, since 1 + 2 + 1 + 331 + 0 + 1 + 320 + 10 + 0 + 0 = 666.

It can be written as a sum of positive squares in 16 ways, for example, as 39698089612164 + 81632923588836 = 6300642^2 + 9035094^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 139760272 + ... + 140625728.

Almost surely, 2^{121331013201000} is an apocalyptic number.

121331013201000 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 121331013201000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211091749062480).

121331013201000 is an abundant number, since it is smaller than the sum of its proper divisors (300852484923960).

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

121331013201000 is a wasteful number, since it uses less digits than its factorization.

121331013201000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865942 (or 865925 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 121331013201000 its reverse (102310133121), we get a palindrome (121433323334121).

The spelling of 121331013201000 in words is "one hundred twenty-one trillion, three hundred thirty-one billion, thirteen million, two hundred one thousand".