21611001602 has 16 divisors (see below), whose sum is σ = 32588481600. Its totient is φ = 10748205072.

The previous prime is 21611001593. The next prime is 21611001611. The reversal of 21611001602 is 20610011612.

It is an interprime number because it is at equal distance from previous prime (21611001593) and next prime (21611001611).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2320868 + ... + 2330160.

It is an arithmetic number, because the mean of its divisors is an integer number (2036780100).

Almost surely, 2^21611001602 is an apocalyptic number.

21611001602 is a deficient number, since it is larger than the sum of its proper divisors (10977479998).

21611001602 is a wasteful number, since it uses less digits than its factorization.

21611001602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15337.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 21611001602 in words is "twenty-one billion, six hundred eleven million, one thousand, six hundred two".