12121042402 has 16 divisors (see below), whose sum is σ = 20791419840. Its totient is φ = 5191609968.

The previous prime is 12121042387. The next prime is 12121042403. The reversal of 12121042402 is 20424012121.

It is a super-2 number, since 2×12121042402² (a number of 21 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 12121042402.

It is not an unprimeable number, because it can be changed into a prime (12121042403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 236008 + ... + 282739.

It is an arithmetic number, because the mean of its divisors is an integer number (1299463740).

Almost surely, 2^12121042402 is an apocalyptic number.

12121042402 is a deficient number, since it is larger than the sum of its proper divisors (8670377438).

12121042402 is a wasteful number, since it uses less digits than its factorization.

12121042402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520425.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 12121042402 its reverse (20424012121), we get a palindrome (32545054523).

The spelling of 12121042402 in words is "twelve billion, one hundred twenty-one million, forty-two thousand, four hundred two".