2021314849991 has 4 divisors (see below), whose sum is σ = 2032998751032. Its totient is φ = 2009630948952.

The previous prime is 2021314849937. The next prime is 2021314850021. The reversal of 2021314849991 is 1999484131202.

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 2021314849991 - 2³⁰ = 2020241108167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021314849901) 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, 5841950261 + ... + 5841950606.

It is an arithmetic number, because the mean of its divisors is an integer number (508249687758).

Almost surely, 2^{2021314849991} is an apocalyptic number.

2021314849991 is a deficient number, since it is larger than the sum of its proper divisors (11683901041).

2021314849991 is a wasteful number, since it uses less digits than its factorization.

2021314849991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11683901040.

The product of its (nonzero) digits is 1119744, while the sum is 53.

The spelling of 2021314849991 in words is "two trillion, twenty-one billion, three hundred fourteen million, eight hundred forty-nine thousand, nine hundred ninety-one".