121215402492 has 12 divisors (see below), whose sum is σ = 282835939176. Its totient is φ = 40405134160.

The previous prime is 121215402431. The next prime is 121215402521. The reversal of 121215402492 is 294204512121.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5050641759 + ... + 5050641782.

It is an arithmetic number, because the mean of its divisors is an integer number (23569661598).

Almost surely, 2^121215402492 is an apocalyptic number.

121215402492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121215402492 is an abundant number, since it is smaller than the sum of its proper divisors (161620536684).

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

121215402492 is a wasteful number, since it uses less digits than its factorization.

121215402492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10101283548 (or 10101283546 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The spelling of 121215402492 in words is "one hundred twenty-one billion, two hundred fifteen million, four hundred two thousand, four hundred ninety-two".