2133371797721 has 8 divisors (see below), whose sum is σ = 2260764059400. Its totient is φ = 2009568050560.

The previous prime is 2133371797717. The next prime is 2133371797771. The reversal of 2133371797721 is 1277971733312.

It can be written as a sum of positive squares in 4 ways, for example, as 217193281600 + 1916178516121 = 466040^2 + 1384261^2 .

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 2133371797721 - 2² = 2133371797717 is a prime.

It is a super-2 number, since 2×2133371797721² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2133371797771) 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, 897127406 + ... + 897129783.

It is an arithmetic number, because the mean of its divisors is an integer number (282595507425).

Almost surely, 2^{2133371797721} is an apocalyptic number.

It is an amenable number.

2133371797721 is a deficient number, since it is larger than the sum of its proper divisors (127392261679).

2133371797721 is a wasteful number, since it uses less digits than its factorization.

2133371797721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1794257259.

The product of its digits is 2333772, while the sum is 53.

The spelling of 2133371797721 in words is "two trillion, one hundred thirty-three billion, three hundred seventy-one million, seven hundred ninety-seven thousand, seven hundred twenty-one".