222102100211021 has 4 divisors (see below), whose sum is σ = 222438109440444. Its totient is φ = 221766090981600.

The previous prime is 222102100210997. The next prime is 222102100211053. The reversal of 222102100211021 is 120112001201222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 124984820074921 + 97117280136100 = 11179661^2 + 9854810^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222102100211021 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 (222102100210021) 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, 168004613720 + ... + 168004615041.

It is an arithmetic number, because the mean of its divisors is an integer number (55609527360111).

Almost surely, 2^{222102100211021} is an apocalyptic number.

It is an amenable number.

222102100211021 is a deficient number, since it is larger than the sum of its proper divisors (336009229423).

222102100211021 is an equidigital number, since it uses as much as digits as its factorization.

222102100211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336009229422.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 222102100211021 its reverse (120112001201222), we get a palindrome (342214101412243).

The spelling of 222102100211021 in words is "two hundred twenty-two trillion, one hundred two billion, one hundred million, two hundred eleven thousand, twenty-one".