21500151252101 has 8 divisors (see below), whose sum is σ = 21624559463424. Its totient is φ = 21375744534000.

The previous prime is 21500151252089. The next prime is 21500151252137. The reversal of 21500151252101 is 10125215100512.

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

It is a cyclic number.

It is not a de Polignac number, because 21500151252101 - 2¹⁰ = 21500151251077 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 (21500151252301) 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, 43120976 + ... + 43616726.

It is an arithmetic number, because the mean of its divisors is an integer number (2703069932928).

Almost surely, 2^{21500151252101} is an apocalyptic number.

It is an amenable number.

21500151252101 is a deficient number, since it is larger than the sum of its proper divisors (124408211323).

21500151252101 is a wasteful number, since it uses less digits than its factorization.

21500151252101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746611.

The product of its (nonzero) digits is 1000, while the sum is 26.

Adding to 21500151252101 its reverse (10125215100512), we get a palindrome (31625366352613).

The spelling of 21500151252101 in words is "twenty-one trillion, five hundred billion, one hundred fifty-one million, two hundred fifty-two thousand, one hundred one".