2021111222201 has 4 divisors (see below), whose sum is σ = 2021306641152. Its totient is φ = 2020915803252.

The previous prime is 2021111222177. The next prime is 2021111222279. The reversal of 2021111222201 is 1022221111202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021111222201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2021111222201.

It is not an unprimeable number, because it can be changed into a prime (2021111222281) 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, 97693961 + ... + 97714646.

It is an arithmetic number, because the mean of its divisors is an integer number (505326660288).

Almost surely, 2^{2021111222201} is an apocalyptic number.

It is an amenable number.

2021111222201 is a deficient number, since it is larger than the sum of its proper divisors (195418951).

2021111222201 is a wasteful number, since it uses less digits than its factorization.

2021111222201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195418950.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2021111222201 its reverse (1022221111202), we get a palindrome (3043332333403).

The spelling of 2021111222201 in words is "two trillion, twenty-one billion, one hundred eleven million, two hundred twenty-two thousand, two hundred one".