2021211911941 has 4 divisors (see below), whose sum is σ = 2021220522412. Its totient is φ = 2021203301472.

The previous prime is 2021211911903. The next prime is 2021211911959. The reversal of 2021211911941 is 1491191121202.

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

It can be written as a sum of positive squares in 2 ways, for example, as 65910292900 + 1955301619041 = 256730^2 + 1398321^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021211911941 - 2⁷ = 2021211911813 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021211911897 and 2021211911906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021211611941) 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, 3942966 + ... + 4425991.

It is an arithmetic number, because the mean of its divisors is an integer number (505305130603).

Almost surely, 2^{2021211911941} is an apocalyptic number.

It is an amenable number.

2021211911941 is a deficient number, since it is larger than the sum of its proper divisors (8610471).

2021211911941 is an equidigital number, since it uses as much as digits as its factorization.

2021211911941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8610470.

The product of its (nonzero) digits is 2592, while the sum is 34.

The spelling of 2021211911941 in words is "two trillion, twenty-one billion, two hundred eleven million, nine hundred eleven thousand, nine hundred forty-one".