2102220002021 has 4 divisors (see below), whose sum is σ = 2102242785312. Its totient is φ = 2102197218732.

The previous prime is 2102220002017. The next prime is 2102220002027. The reversal of 2102220002021 is 1202000222012.

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 2102220002021 - 2² = 2102220002017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2102220001987 and 2102220002005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102220002027) 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, 11252675 + ... + 11437968.

It is an arithmetic number, because the mean of its divisors is an integer number (525560696328).

Almost surely, 2^{2102220002021} is an apocalyptic number.

It is an amenable number.

2102220002021 is a deficient number, since it is larger than the sum of its proper divisors (22783291).

2102220002021 is an equidigital number, since it uses as much as digits as its factorization.

2102220002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22783290.

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

Adding to 2102220002021 its reverse (1202000222012), we get a palindrome (3304220224033).

The spelling of 2102220002021 in words is "two trillion, one hundred two billion, two hundred twenty million, two thousand, twenty-one".