220212001 has 4 divisors (see below), whose sum is σ = 221796400. Its totient is φ = 218627604.

The previous prime is 220211989. The next prime is 220212023. The reversal of 220212001 is 100212022.

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 220212001 - 2²¹ = 218114849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220212301) 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, 791991 + ... + 792268.

It is an arithmetic number, because the mean of its divisors is an integer number (55449100).

Almost surely, 2^220212001 is an apocalyptic number.

It is an amenable number.

220212001 is a deficient number, since it is larger than the sum of its proper divisors (1584399).

220212001 is a wasteful number, since it uses less digits than its factorization.

220212001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584398.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 220212001 is about 14839.5418055949. The cubic root of 220212001 is about 603.8749220192.

Adding to 220212001 its reverse (100212022), we get a palindrome (320424023).

The spelling of 220212001 in words is "two hundred twenty million, two hundred twelve thousand, one".