21277267157121 has 8 divisors (see below), whose sum is σ = 28409703212160. Its totient is φ = 14164837936752.

The previous prime is 21277267157071. The next prime is 21277267157141. The reversal of 21277267157121 is 12175176277212.

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

It is not a de Polignac number, because 21277267157121 - 2¹⁹ = 21277266632833 is a prime.

It is a super-2 number, since 2×21277267157121² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21277267157141) 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, 5001706185 + ... + 5001710438.

It is an arithmetic number, because the mean of its divisors is an integer number (3551212901520).

Almost surely, 2^{21277267157121} is an apocalyptic number.

It is an amenable number.

21277267157121 is a deficient number, since it is larger than the sum of its proper divisors (7132436055039).

21277267157121 is a wasteful number, since it uses less digits than its factorization.

21277267157121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10003417335.

The product of its digits is 1152480, while the sum is 51.

The spelling of 21277267157121 in words is "twenty-one trillion, two hundred seventy-seven billion, two hundred sixty-seven million, one hundred fifty-seven thousand, one hundred twenty-one".