12121025402 has 16 divisors (see below), whose sum is σ = 18280872960. Its totient is φ = 6027454512.

The previous prime is 12121025363. The next prime is 12121025437. The reversal of 12121025402 is 20452012121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 464063 + ... + 489485.

It is an arithmetic number, because the mean of its divisors is an integer number (1142554560).

Almost surely, 2^12121025402 is an apocalyptic number.

12121025402 is a deficient number, since it is larger than the sum of its proper divisors (6159847558).

12121025402 is a wasteful number, since it uses less digits than its factorization.

12121025402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26717.

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 12121025402 its reverse (20452012121), we get a palindrome (32573037523).

The spelling of 12121025402 in words is "twelve billion, one hundred twenty-one million, twenty-five thousand, four hundred two".