2211111102021 has 4 divisors (see below), whose sum is σ = 2948148136032. Its totient is φ = 1474074068012.

The previous prime is 2211111102019. The next prime is 2211111102059. The reversal of 2211111102021 is 1202011111122.

It is a happy number.

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 not a de Polignac number, because 2211111102021 - 2¹ = 2211111102019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211111102121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 368518517001 + ... + 368518517006.

It is an arithmetic number, because the mean of its divisors is an integer number (737037034008).

Almost surely, 2^{2211111102021} is an apocalyptic number.

It is an amenable number.

2211111102021 is a deficient number, since it is larger than the sum of its proper divisors (737037034011).

2211111102021 is an equidigital number, since it uses as much as digits as its factorization.

2211111102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737037034010.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 2211111102021 its reverse (1202011111122), we get a palindrome (3413122213143).

It can be divided in two parts, 2211111 and 102021, that added together give a palindrome (2313132).

The spelling of 2211111102021 in words is "two trillion, two hundred eleven billion, one hundred eleven million, one hundred two thousand, twenty-one".