222221021001 has 16 divisors (see below), whose sum is σ = 338649330048. Its totient is φ = 126973382400.

The previous prime is 222221020991. The next prime is 222221021051. The reversal of 222221021001 is 100120122222.

It is not a de Polignac number, because 222221021001 - 2²⁶ = 222153912137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (222221021051) 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, 143440 + ... + 681921.

It is an arithmetic number, because the mean of its divisors is an integer number (21165583128).

Almost surely, 2^222221021001 is an apocalyptic number.

222221021001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

222221021001 is a deficient number, since it is larger than the sum of its proper divisors (116428309047).

222221021001 is a wasteful number, since it uses less digits than its factorization.

222221021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838192.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 222221021001 its reverse (100120122222), we get a palindrome (322341143223).

The spelling of 222221021001 in words is "two hundred twenty-two billion, two hundred twenty-one million, twenty-one thousand, one".