121012313521240 has 64 divisors (see below), whose sum is σ = 278430580863360. Its totient is φ = 47313745574400.

The previous prime is 121012313521111. The next prime is 121012313521279. The reversal of 121012313521240 is 42125313210121.

It is a super-2 number, since 2×121012313521240² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121012313521199 and 121012313521208.

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, 40182111 + ... + 43088590.

It is an arithmetic number, because the mean of its divisors is an integer number (4350477825990).

Almost surely, 2^{121012313521240} is an apocalyptic number.

121012313521240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121012313521240 is an abundant number, since it is smaller than the sum of its proper divisors (157418267342120).

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

121012313521240 is a wasteful number, since it uses less digits than its factorization.

121012313521240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83271532 (or 83271528 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

Adding to 121012313521240 its reverse (42125313210121), we get a palindrome (163137626731361).

The spelling of 121012313521240 in words is "one hundred twenty-one trillion, twelve billion, three hundred thirteen million, five hundred twenty-one thousand, two hundred forty".