2222002100021 has 4 divisors (see below), whose sum is σ = 2424002290944. Its totient is φ = 2020001909100.

The previous prime is 2222002099973. The next prime is 2222002100029. The reversal of 2222002100021 is 1200012002222.

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 2222002100021 - 2⁶ = 2222002099957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2222002099969 and 2222002100005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2222002100029) 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, 101000095445 + ... + 101000095466.

It is an arithmetic number, because the mean of its divisors is an integer number (606000572736).

Almost surely, 2^{2222002100021} is an apocalyptic number.

It is an amenable number.

2222002100021 is a deficient number, since it is larger than the sum of its proper divisors (202000190923).

2222002100021 is a wasteful number, since it uses less digits than its factorization.

2222002100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202000190922.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 2222002100021 its reverse (1200012002222), we get a palindrome (3422014102243).

The spelling of 2222002100021 in words is "two trillion, two hundred twenty-two billion, two million, one hundred thousand, twenty-one".