1220022001 has 8 divisors (see below), whose sum is σ = 1353492000. Its totient is φ = 1090311840.

The previous prime is 1220021989. The next prime is 1220022029. The reversal of 1220022001 is 1002200221.

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 1220022001 - 2⁵ = 1220021969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220022031) 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, 939276 + ... + 940573.

It is an arithmetic number, because the mean of its divisors is an integer number (169186500).

Almost surely, 2^1220022001 is an apocalyptic number.

1220022001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1220022001 is a deficient number, since it is larger than the sum of its proper divisors (133469999).

1220022001 is a wasteful number, since it uses less digits than its factorization.

1220022001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1879919.

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

The square root of 1220022001 is about 34928.8133351249. The cubic root of 1220022001 is about 1068.5361532585.

Adding to 1220022001 its reverse (1002200221), we get a palindrome (2222222222).

The spelling of 1220022001 in words is "one billion, two hundred twenty million, twenty-two thousand, one".