2222100021 has 4 divisors (see below), whose sum is σ = 2962800032. Its totient is φ = 1481400012.

The previous prime is 2222099969. The next prime is 2222100029. The reversal of 2222100021 is 1200012222.

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 not a de Polignac number, because 2222100021 - 2¹⁰ = 2222098997 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 (2222100029) 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, 370350001 + ... + 370350006.

It is an arithmetic number, because the mean of its divisors is an integer number (740700008).

Almost surely, 2^2222100021 is an apocalyptic number.

It is an amenable number.

2222100021 is a deficient number, since it is larger than the sum of its proper divisors (740700011).

2222100021 is an equidigital number, since it uses as much as digits as its factorization.

2222100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740700010.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 2222100021 is about 47139.1559215903. The cubic root of 2222100021 is about 1304.9319598706.

Adding to 2222100021 its reverse (1200012222), we get a palindrome (3422112243).

The spelling of 2222100021 in words is "two billion, two hundred twenty-two million, one hundred thousand, twenty-one".