2212020021 has 4 divisors (see below), whose sum is σ = 2949360032. Its totient is φ = 1474680012.

The previous prime is 2212020017. The next prime is 2212020023. The reversal of 2212020021 is 1200202122.

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 2212020021 - 2² = 2212020017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2212019979 and 2212020006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2212020023) 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, 368670001 + ... + 368670006.

It is an arithmetic number, because the mean of its divisors is an integer number (737340008).

Almost surely, 2^2212020021 is an apocalyptic number.

It is an amenable number.

2212020021 is a deficient number, since it is larger than the sum of its proper divisors (737340011).

2212020021 is an equidigital number, since it uses as much as digits as its factorization.

2212020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737340010.

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

The square root of 2212020021 is about 47032.1169096183. The cubic root of 2212020021 is about 1302.9558031095.

Adding to 2212020021 its reverse (1200202122), we get a palindrome (3412222143).

The spelling of 2212020021 in words is "two billion, two hundred twelve million, twenty thousand, twenty-one".