21116142602 has 4 divisors (see below), whose sum is σ = 31674213906. Its totient is φ = 10558071300.

The previous prime is 21116142601. The next prime is 21116142659. The reversal of 21116142602 is 20624161112.

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., 15321735961 + 5794406641 = 123781^2 + 76121^2 .

It is not an unprimeable number, because it can be changed into a prime (21116142601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5279035649 + ... + 5279035652.

Almost surely, 2^21116142602 is an apocalyptic number.

21116142602 is a deficient number, since it is larger than the sum of its proper divisors (10558071304).

21116142602 is a wasteful number, since it uses less digits than its factorization.

21116142602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10558071303.

The product of its (nonzero) digits is 1152, while the sum is 26.

The spelling of 21116142602 in words is "twenty-one billion, one hundred sixteen million, one hundred forty-two thousand, six hundred two".