13121401402 has 4 divisors (see below), whose sum is σ = 19682102106. Its totient is φ = 6560700700.

The previous prime is 13121401373. The next prime is 13121401417. The reversal of 13121401402 is 20410412131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20410412131 = 48677 ⋅419303.

It can be written as a sum of positive squares in only one way, i.e., 11206551321 + 1914850081 = 105861^2 + 43759^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13121401402.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3280350349 + ... + 3280350352.

Almost surely, 2^13121401402 is an apocalyptic number.

13121401402 is a deficient number, since it is larger than the sum of its proper divisors (6560700704).

13121401402 is an equidigital number, since it uses as much as digits as its factorization.

13121401402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6560700703.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 13121401402 its reverse (20410412131), we get a palindrome (33531813533).

The spelling of 13121401402 in words is "thirteen billion, one hundred twenty-one million, four hundred one thousand, four hundred two".