2212022122021 has 4 divisors (see below), whose sum is σ = 2221681607500. Its totient is φ = 2202362636544.

The previous prime is 2212022121979. The next prime is 2212022122073. The reversal of 2212022122021 is 1202212202122.

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 1748926900900 + 463095221121 = 1322470^2 + 680511^2 .

It is a cyclic number.

It is not a de Polignac number, because 2212022122021 - 2⁹ = 2212022121509 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 2212022122021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2212022122421) 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, 4829742396 + ... + 4829742853.

It is an arithmetic number, because the mean of its divisors is an integer number (555420401875).

Almost surely, 2^{2212022122021} is an apocalyptic number.

It is an amenable number.

2212022122021 is a deficient number, since it is larger than the sum of its proper divisors (9659485479).

2212022122021 is an equidigital number, since it uses as much as digits as its factorization.

2212022122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9659485478.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 2212022122021 its reverse (1202212202122), we get a palindrome (3414234324143).

It can be divided in two parts, 22 and 12022122021, that multiplied together give a palindrome (264486684462).

The spelling of 2212022122021 in words is "two trillion, two hundred twelve billion, twenty-two million, one hundred twenty-two thousand, twenty-one".