2212220021 has 8 divisors (see below), whose sum is σ = 2496549600. Its totient is φ = 1941760240.

The previous prime is 2212219969. The next prime is 2212220039. The reversal of 2212220021 is 1200222122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2212220021 - 2⁶ = 2212219957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2212219978 and 2212220005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2212220041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3467111 + ... + 3467748.

It is an arithmetic number, because the mean of its divisors is an integer number (312068700).

Almost surely, 2^2212220021 is an apocalyptic number.

It is an amenable number.

2212220021 is a deficient number, since it is larger than the sum of its proper divisors (284329579).

2212220021 is a wasteful number, since it uses less digits than its factorization.

2212220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6934899.

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

The square root of 2212220021 is about 47034.2430682157. The cubic root of 2212220021 is about 1302.9950708835.

Adding to 2212220021 its reverse (1200222122), we get a palindrome (3412442143).

The spelling of 2212220021 in words is "two billion, two hundred twelve million, two hundred twenty thousand, twenty-one".