222100021102021 has 4 divisors (see below), whose sum is σ = 224299031212044. Its totient is φ = 219901010992000.

The previous prime is 222100021101949. The next prime is 222100021102049. The reversal of 222100021102021 is 120201120001222.

It is a happy number.

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 104747323728996 + 117352697373025 = 10234614^2 + 10832945^2 .

It is a cyclic number.

It is not a de Polignac number, because 222100021102021 - 2³⁵ = 222065661363653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222100021101986 and 222100021102004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222100021102061) 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, 1099505054860 + ... + 1099505055061.

It is an arithmetic number, because the mean of its divisors is an integer number (56074757803011).

Almost surely, 2^{222100021102021} is an apocalyptic number.

It is an amenable number.

222100021102021 is a deficient number, since it is larger than the sum of its proper divisors (2199010110023).

222100021102021 is a wasteful number, since it uses less digits than its factorization.

222100021102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2199010110022.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 222100021102021 its reverse (120201120001222), we get a palindrome (342301141103243).

The spelling of 222100021102021 in words is "two hundred twenty-two trillion, one hundred billion, twenty-one million, one hundred two thousand, twenty-one".