21616221341121 has 64 divisors (see below), whose sum is σ = 33213733862400. Its totient is φ = 12367347148800.

The previous prime is 21616221341069. The next prime is 21616221341123. The reversal of 21616221341121 is 12114312261612.

It is not a de Polignac number, because 21616221341121 - 2¹⁷ = 21616221210049 is a prime.

It is a super-2 number, since 2×21616221341121² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (21616221341123) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 382634245 + ... + 382690733.

It is an arithmetic number, because the mean of its divisors is an integer number (518964591600).

Almost surely, 2^{21616221341121} is an apocalyptic number.

It is an amenable number.

21616221341121 is a deficient number, since it is larger than the sum of its proper divisors (11597512521279).

21616221341121 is a wasteful number, since it uses less digits than its factorization.

21616221341121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58670.

The product of its digits is 6912, while the sum is 33.

The spelling of 21616221341121 in words is "twenty-one trillion, six hundred sixteen billion, two hundred twenty-one million, three hundred forty-one thousand, one hundred twenty-one".