20121232402 has 8 divisors (see below), whose sum is σ = 31957251516. Its totient is φ = 9468815232.

The previous prime is 20121232399. The next prime is 20121232451. The reversal of 20121232402 is 20423212102.

It can be written as a sum of positive squares in 2 ways, for example, as 15405526161 + 4715706241 = 124119^2 + 68671^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20121232402.

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, 295900443 + ... + 295900510.

Almost surely, 2^20121232402 is an apocalyptic number.

20121232402 is a deficient number, since it is larger than the sum of its proper divisors (11836019114).

20121232402 is a wasteful number, since it uses less digits than its factorization.

20121232402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591800972.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 20121232402 its reverse (20423212102), we get a palindrome (40544444504).

The spelling of 20121232402 in words is "twenty billion, one hundred twenty-one million, two hundred thirty-two thousand, four hundred two".