121554001253240 has 64 divisors (see below), whose sum is σ = 274521204799200. Its totient is φ = 48439757463552.

The previous prime is 121554001253239. The next prime is 121554001253339. The reversal of 121554001253240 is 42352100455121.

It is a super-2 number, since 2×121554001253240² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121554001253240.

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, 6829196 + ... + 17021924.

Almost surely, 2^{121554001253240} is an apocalyptic number.

121554001253240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121554001253240 is an abundant number, since it is smaller than the sum of its proper divisors (152967203545960).

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

121554001253240 is a wasteful number, since it uses less digits than its factorization.

121554001253240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10193856 (or 10193852 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 35.

The spelling of 121554001253240 in words is "one hundred twenty-one trillion, five hundred fifty-four billion, one million, two hundred fifty-three thousand, two hundred forty".