21512201005677 has 8 divisors (see below), whose sum is σ = 28682996686240. Its totient is φ = 14341436331120.

The previous prime is 21512201005637. The next prime is 21512201005679. The reversal of 21512201005677 is 77650010221512.

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

It is not a de Polignac number, because 21512201005677 - 2³⁰ = 21511127263853 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 (21512201005679) 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, 6081199 + ... + 8944572.

It is an arithmetic number, because the mean of its divisors is an integer number (3585374585780).

Almost surely, 2^{21512201005677} is an apocalyptic number.

It is an amenable number.

21512201005677 is a deficient number, since it is larger than the sum of its proper divisors (7170795680563).

21512201005677 is a wasteful number, since it uses less digits than its factorization.

21512201005677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15503003.

The product of its (nonzero) digits is 58800, while the sum is 39.

The spelling of 21512201005677 in words is "twenty-one trillion, five hundred twelve billion, two hundred one million, five thousand, six hundred seventy-seven".