11512321402 has 4 divisors (see below), whose sum is σ = 17268482106. Its totient is φ = 5756160700.

The previous prime is 11512321397. The next prime is 11512321411. The reversal of 11512321402 is 20412321511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10326827641 + 1185493761 = 101621^2 + 34431^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2878080349 + ... + 2878080352.

Almost surely, 2^11512321402 is an apocalyptic number.

11512321402 is a deficient number, since it is larger than the sum of its proper divisors (5756160704).

11512321402 is an equidigital number, since it uses as much as digits as its factorization.

11512321402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5756160703.

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 11512321402 its reverse (20412321511), we get a palindrome (31924642913).

The spelling of 11512321402 in words is "eleven billion, five hundred twelve million, three hundred twenty-one thousand, four hundred two".