21201022121119 has 4 divisors (see below), whose sum is σ = 21204925831600. Its totient is φ = 21197118410640.

The previous prime is 21201022121113. The next prime is 21201022121173. The reversal of 21201022121119 is 91112122010212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21201022121119 - 2⁵ = 21201022121087 is a prime.

It is a super-2 number, since 2×21201022121119² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21201022121093 and 21201022121102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201022121113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1951847094 + ... + 1951857955.

It is an arithmetic number, because the mean of its divisors is an integer number (5301231457900).

Almost surely, 2^{21201022121119} is an apocalyptic number.

21201022121119 is a deficient number, since it is larger than the sum of its proper divisors (3903710481).

21201022121119 is an equidigital number, since it uses as much as digits as its factorization.

21201022121119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3903710480.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 21201022121119 in words is "twenty-one trillion, two hundred one billion, twenty-two million, one hundred twenty-one thousand, one hundred nineteen".