2210020220021 has 6 divisors (see below), whose sum is σ = 2347668538530. Its totient is φ = 2080019030336.

The previous prime is 2210020220011. The next prime is 2210020220039. The reversal of 2210020220021 is 1200220200122.

It can be written as a sum of positive squares in 3 ways, for example, as 962076531025 + 1247943688996 = 980855^2 + 1117114^2 .

It is not a de Polignac number, because 2210020220021 - 2¹⁸ = 2210019957877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2210020219978 and 2210020220005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2210020220011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3823564106 + ... + 3823564683.

It is an arithmetic number, because the mean of its divisors is an integer number (391278089755).

Almost surely, 2^{2210020220021} is an apocalyptic number.

It is an amenable number.

2210020220021 is a deficient number, since it is larger than the sum of its proper divisors (137648318509).

2210020220021 is an equidigital number, since it uses as much as digits as its factorization.

2210020220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7647128823 (or 7647128806 counting only the distinct ones).

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

Adding to 2210020220021 its reverse (1200220200122), we get a palindrome (3410240420143).

The spelling of 2210020220021 in words is "two trillion, two hundred ten billion, twenty million, two hundred twenty thousand, twenty-one".