21270501127 has 8 divisors (see below), whose sum is σ = 21309118064. Its totient is φ = 21231911808.

The previous prime is 21270501097. The next prime is 21270501157. The reversal of 21270501127 is 72110507212.

It is an interprime number because it is at equal distance from previous prime (21270501097) and next prime (21270501157).

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 21270501127 - 2¹¹ = 21270499079 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21270501095 and 21270501104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21270501157) 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, 2071468 + ... + 2081710.

It is an arithmetic number, because the mean of its divisors is an integer number (2663639758).

Almost surely, 2^21270501127 is an apocalyptic number.

21270501127 is a deficient number, since it is larger than the sum of its proper divisors (38616937).

21270501127 is a wasteful number, since it uses less digits than its factorization.

21270501127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13809.

The product of its (nonzero) digits is 1960, while the sum is 28.

The spelling of 21270501127 in words is "twenty-one billion, two hundred seventy million, five hundred one thousand, one hundred twenty-seven".