12198512402 has 4 divisors (see below), whose sum is σ = 18297768606. Its totient is φ = 6099256200.

The previous prime is 12198512341. The next prime is 12198512437. The reversal of 12198512402 is 20421589121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20421589121 = 1601 ⋅12755521.

It can be written as a sum of positive squares in only one way, i.e., 12177343201 + 21169201 = 110351^2 + 4601^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3049628099 + ... + 3049628102.

Almost surely, 2^12198512402 is an apocalyptic number.

12198512402 is a deficient number, since it is larger than the sum of its proper divisors (6099256204).

12198512402 is an equidigital number, since it uses as much as digits as its factorization.

12198512402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6099256203.

The product of its (nonzero) digits is 11520, while the sum is 35.

The spelling of 12198512402 in words is "twelve billion, one hundred ninety-eight million, five hundred twelve thousand, four hundred two".