21100581921419 has 32 divisors (see below), whose sum is σ = 29244749721600. Its totient is φ = 14687653276800.

The previous prime is 21100581921407. The next prime is 21100581921467. The reversal of 21100581921419 is 91412918500112.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-21100581921419 is a prime.

It is a super-2 number, since 2×21100581921419² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21100581921419.

It is not an unprimeable number, because it can be changed into a prime (21100581921019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 339960944 + ... + 340023005.

It is an arithmetic number, because the mean of its divisors is an integer number (913898428800).

Almost surely, 2^{21100581921419} is an apocalyptic number.

21100581921419 is a deficient number, since it is larger than the sum of its proper divisors (8144167800181).

21100581921419 is a wasteful number, since it uses less digits than its factorization.

21100581921419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679984011.

The product of its (nonzero) digits is 51840, while the sum is 44.

The spelling of 21100581921419 in words is "twenty-one trillion, one hundred billion, five hundred eighty-one million, nine hundred twenty-one thousand, four hundred nineteen".