222220210001021 has 4 divisors (see below), whose sum is σ = 222477707348352. Its totient is φ = 221962712653692.

The previous prime is 222220210000993. The next prime is 222220210001029. The reversal of 222220210001021 is 120100012022222.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 222220210001021 - 2³⁸ = 221945332094077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222220210001029) 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, 128748672371 + ... + 128748674096.

It is an arithmetic number, because the mean of its divisors is an integer number (55619426837088).

Almost surely, 2^{222220210001021} is an apocalyptic number.

It is an amenable number.

222220210001021 is a deficient number, since it is larger than the sum of its proper divisors (257497347331).

222220210001021 is an equidigital number, since it uses as much as digits as its factorization.

222220210001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257497347330.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 222220210001021 its reverse (120100012022222), we get a palindrome (342320222023243).

The spelling of 222220210001021 in words is "two hundred twenty-two trillion, two hundred twenty billion, two hundred ten million, one thousand, twenty-one".