2221222212021 has 16 divisors (see below), whose sum is σ = 3019630254336. Its totient is φ = 1451853763776.

The previous prime is 2221222212017. The next prime is 2221222212037. The reversal of 2221222212021 is 1202122221222.

It is not a de Polignac number, because 2221222212021 - 2² = 2221222212017 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221222212221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4682370 + ... + 5134883.

It is an arithmetic number, because the mean of its divisors is an integer number (188726890896).

Almost surely, 2^{2221222212021} is an apocalyptic number.

It is an amenable number.

2221222212021 is a deficient number, since it is larger than the sum of its proper divisors (798408042315).

2221222212021 is a wasteful number, since it uses less digits than its factorization.

2221222212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9818732.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 2221222212021 its reverse (1202122221222), we get a palindrome (3423344433243).

The spelling of 2221222212021 in words is "two trillion, two hundred twenty-one billion, two hundred twenty-two million, two hundred twelve thousand, twenty-one".