12420555510402 has 192 divisors, whose sum is σ = 29246137240320. Its totient is φ = 3787007040000.

The previous prime is 12420555510373. The next prime is 12420555510437. The reversal of 12420555510402 is 20401555502421.

12420555510402 is a `hidden beast` number, since 1 + 242 + 0 + 5 + 5 + 5 + 5 + 1 + 0 + 402 = 666.

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, 17518413624 + ... + 17518414332.

It is an arithmetic number, because the mean of its divisors is an integer number (152323631460).

Almost surely, 2^{12420555510402} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12420555510402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14623068620160).

12420555510402 is an abundant number, since it is smaller than the sum of its proper divisors (16825581729918).

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

12420555510402 is a wasteful number, since it uses less digits than its factorization.

12420555510402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2089 (or 2086 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 36.

The spelling of 12420555510402 in words is "twelve trillion, four hundred twenty billion, five hundred fifty-five million, five hundred ten thousand, four hundred two".