21185386722041 has 8 divisors (see below), whose sum is σ = 21293280888000. Its totient is φ = 21077506905840.

The previous prime is 21185386722037. The next prime is 21185386722089. The reversal of 21185386722041 is 14022768358112.

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 21185386722041 - 2² = 21185386722037 is a prime.

It is a super-2 number, since 2×21185386722041² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21185386742041) 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, 620975 + ... + 6538836.

It is an arithmetic number, because the mean of its divisors is an integer number (2661660111000).

Almost surely, 2^{21185386722041} is an apocalyptic number.

It is an amenable number.

21185386722041 is a deficient number, since it is larger than the sum of its proper divisors (107894165959).

21185386722041 is a wasteful number, since it uses less digits than its factorization.

21185386722041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7174879.

The product of its (nonzero) digits is 1290240, while the sum is 50.

The spelling of 21185386722041 in words is "twenty-one trillion, one hundred eighty-five billion, three hundred eighty-six million, seven hundred twenty-two thousand, forty-one".