21112072601 has 16 divisors (see below), whose sum is σ = 21782671680. Its totient is φ = 20453713920.

The previous prime is 21112072573. The next prime is 21112072603. The reversal of 21112072601 is 10627021112.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21112072601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21112072603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1371590 + ... + 1386896.

It is an arithmetic number, because the mean of its divisors is an integer number (1361416980).

Almost surely, 2^21112072601 is an apocalyptic number.

It is an amenable number.

21112072601 is a deficient number, since it is larger than the sum of its proper divisors (670599079).

21112072601 is a wasteful number, since it uses less digits than its factorization.

21112072601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15704.

The product of its (nonzero) digits is 336, while the sum is 23.

Adding to 21112072601 its reverse (10627021112), we get a palindrome (31739093713).

The spelling of 21112072601 in words is "twenty-one billion, one hundred twelve million, seventy-two thousand, six hundred one".