20121120012402 has 24 divisors (see below), whose sum is σ = 45210417806736. Its totient is φ = 6707040003972.

The previous prime is 20121120012311. The next prime is 20121120012421. The reversal of 20121120012402 is 20421002112102.

20121120012402 is a `hidden beast` number, since 20 + 1 + 211 + 20 + 0 + 12 + 402 = 666.

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 11 ways as a sum of consecutive naturals, for example, 20700740268 + ... + 20700741239.

It is an arithmetic number, because the mean of its divisors is an integer number (1883767408614).

Almost surely, 2^{20121120012402} is an apocalyptic number.

20121120012402 is an abundant number, since it is smaller than the sum of its proper divisors (25089297794334).

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

20121120012402 is an equidigital number, since it uses as much as digits as its factorization.

20121120012402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41401481524 (or 41401481512 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20121120012402 its reverse (20421002112102), we get a palindrome (40542122124504).

The spelling of 20121120012402 in words is "twenty trillion, one hundred twenty-one billion, one hundred twenty million, twelve thousand, four hundred two".