222221002211021 has 32 divisors (see below), whose sum is σ = 257116207723776. Its totient is φ = 190063247616000.

The previous prime is 222221002211009. The next prime is 222221002211029. The reversal of 222221002211021 is 120112200122222.

It is a de Polignac number, because none of the positive numbers 2^k-222221002211021 is a prime.

It is a super-2 number, since 2×222221002211021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222221002210984 and 222221002211002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222221002211029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 737191751 + ... + 737493131.

It is an arithmetic number, because the mean of its divisors is an integer number (8034881491368).

Almost surely, 2^{222221002211021} is an apocalyptic number.

It is an amenable number.

222221002211021 is a deficient number, since it is larger than the sum of its proper divisors (34895205512755).

222221002211021 is a wasteful number, since it uses less digits than its factorization.

222221002211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349253.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 222221002211021 its reverse (120112200122222), we get a palindrome (342333202333243).

The spelling of 222221002211021 in words is "two hundred twenty-two trillion, two hundred twenty-one billion, two million, two hundred eleven thousand, twenty-one".