222011001 has 12 divisors (see below), whose sum is σ = 320905728. Its totient is φ = 147904344.

The previous prime is 222010961. The next prime is 222011017. The reversal of 222011001 is 100110222.

It is not a de Polignac number, because 222011001 - 2⁶ = 222010937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (222011201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6456 + ... + 22038.

It is an arithmetic number, because the mean of its divisors is an integer number (26742144).

Almost surely, 2^222011001 is an apocalyptic number.

It is an amenable number.

222011001 is a deficient number, since it is larger than the sum of its proper divisors (98894727).

222011001 is a wasteful number, since it uses less digits than its factorization.

222011001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17172 (or 17169 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 222011001 is about 14900.0335905662. The cubic root of 222011001 is about 605.5148962267.

Adding to 222011001 its reverse (100110222), we get a palindrome (322121223).

The spelling of 222011001 in words is "two hundred twenty-two million, eleven thousand, one".