222211021220021 has 4 divisors (see below), whose sum is σ = 222211307468832. Its totient is φ = 222210734971212.

The previous prime is 222211021219991. The next prime is 222211021220057. The reversal of 222211021220021 is 120022120112222.

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 a de Polignac number, because none of the positive numbers 2^k-222211021220021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222211021219975 and 222211021220002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222211021225021) 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, 141956801 + ... + 143513606.

It is an arithmetic number, because the mean of its divisors is an integer number (55552826867208).

Almost surely, 2^{222211021220021} is an apocalyptic number.

It is an amenable number.

222211021220021 is a deficient number, since it is larger than the sum of its proper divisors (286248811).

222211021220021 is an equidigital number, since it uses as much as digits as its factorization.

222211021220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286248810.

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

Adding to 222211021220021 its reverse (120022120112222), we get a palindrome (342233141332243).

The spelling of 222211021220021 in words is "two hundred twenty-two trillion, two hundred eleven billion, twenty-one million, two hundred twenty thousand, twenty-one".