2221022011121 has 4 divisors (see below), whose sum is σ = 2227313858532. Its totient is φ = 2214730163712.

The previous prime is 2221022011079. The next prime is 2221022011123. The reversal of 2221022011121 is 1211102201222.

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 932885539600 + 1288136471521 = 965860^2 + 1134961^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221022011121 - 2²² = 2221017816817 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 2221022011121.

It is not an unprimeable number, because it can be changed into a prime (2221022011123) 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, 3145923176 + ... + 3145923881.

It is an arithmetic number, because the mean of its divisors is an integer number (556828464633).

Almost surely, 2^{2221022011121} is an apocalyptic number.

It is an amenable number.

2221022011121 is a deficient number, since it is larger than the sum of its proper divisors (6291847411).

2221022011121 is an equidigital number, since it uses as much as digits as its factorization.

2221022011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6291847410.

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

Adding to 2221022011121 its reverse (1211102201222), we get a palindrome (3432124212343).

The spelling of 2221022011121 in words is "two trillion, two hundred twenty-one billion, twenty-two million, eleven thousand, one hundred twenty-one".