21264501101 has 8 divisors (see below), whose sum is σ = 21532864704. Its totient is φ = 20997328320.

The previous prime is 21264501067. The next prime is 21264501103. The reversal of 21264501101 is 10110546212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21264501101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21264501103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261740 + ... + 333221.

It is an arithmetic number, because the mean of its divisors is an integer number (2691608088).

Almost surely, 2^21264501101 is an apocalyptic number.

It is an amenable number.

21264501101 is a deficient number, since it is larger than the sum of its proper divisors (268363603).

21264501101 is a wasteful number, since it uses less digits than its factorization.

21264501101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595411.

The product of its (nonzero) digits is 480, while the sum is 23.

The spelling of 21264501101 in words is "twenty-one billion, two hundred sixty-four million, five hundred one thousand, one hundred one".