2220200210021 has 4 divisors (see below), whose sum is σ = 2220498912492. Its totient is φ = 2219901507552.

The previous prime is 2220200210009. The next prime is 2220200210029. The reversal of 2220200210021 is 1200120020222.

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 885283401025 + 1334916808996 = 940895^2 + 1155386^2 .

It is a cyclic number.

It is not a de Polignac number, because 2220200210021 - 2⁶ = 2220200209957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2220200209978 and 2220200210005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220200210029) 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, 149340086 + ... + 149354951.

It is an arithmetic number, because the mean of its divisors is an integer number (555124728123).

Almost surely, 2^{2220200210021} is an apocalyptic number.

It is an amenable number.

2220200210021 is a deficient number, since it is larger than the sum of its proper divisors (298702471).

2220200210021 is an equidigital number, since it uses as much as digits as its factorization.

2220200210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298702470.

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

Adding to 2220200210021 its reverse (1200120020222), we get a palindrome (3420320230243).

The spelling of 2220200210021 in words is "two trillion, two hundred twenty billion, two hundred million, two hundred ten thousand, twenty-one".