21611177412031 has 8 divisors (see below), whose sum is σ = 21834066557744. Its totient is φ = 21388290174720.

The previous prime is 21611177412017. The next prime is 21611177412067. The reversal of 21611177412031 is 13021477111612.

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 21611177412031 - 2⁷ = 21611177411903 is a prime.

It is a super-2 number, since 2×21611177412031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21611177419031) 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, 39292516 + ... + 39838726.

It is an arithmetic number, because the mean of its divisors is an integer number (2729258319718).

Almost surely, 2^{21611177412031} is an apocalyptic number.

21611177412031 is a deficient number, since it is larger than the sum of its proper divisors (222889145713).

21611177412031 is an equidigital number, since it uses as much as digits as its factorization.

21611177412031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954201.

The product of its (nonzero) digits is 14112, while the sum is 37.

The spelling of 21611177412031 in words is "twenty-one trillion, six hundred eleven billion, one hundred seventy-seven million, four hundred twelve thousand, thirty-one".