2221122310221 has 16 divisors (see below), whose sum is σ = 3090338199936. Its totient is φ = 1416330691776.

The previous prime is 2221122310217. The next prime is 2221122310271. The reversal of 2221122310221 is 1220132211222.

It is not a de Polignac number, because 2221122310221 - 2² = 2221122310217 is a prime.

It is a super-2 number, since 2×2221122310221² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221122310271) 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, 2358651 + ... + 3163143.

It is an arithmetic number, because the mean of its divisors is an integer number (193146137496).

Almost surely, 2^{2221122310221} is an apocalyptic number.

It is an amenable number.

2221122310221 is a deficient number, since it is larger than the sum of its proper divisors (869215889715).

2221122310221 is a wasteful number, since it uses less digits than its factorization.

2221122310221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844532.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 2221122310221 its reverse (1220132211222), we get a palindrome (3441254521443).

The spelling of 2221122310221 in words is "two trillion, two hundred twenty-one billion, one hundred twenty-two million, three hundred ten thousand, two hundred twenty-one".