222111211001 has 16 divisors (see below), whose sum is σ = 237550456080. Its totient is φ = 206936524800.

The previous prime is 222111210983. The next prime is 222111211037. The reversal of 222111211001 is 100112111222.

It can be written as a sum of positive squares in 8 ways, for example, as 88477097401 + 133634113600 = 297451^2 + 365560^2 .

It is a cyclic number.

It is not a de Polignac number, because 222111211001 - 2²² = 222107016697 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (222111217001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12898085 + ... + 12915293.

It is an arithmetic number, because the mean of its divisors is an integer number (14846903505).

Almost surely, 2^222111211001 is an apocalyptic number.

It is an amenable number.

222111211001 is a deficient number, since it is larger than the sum of its proper divisors (15439245079).

222111211001 is a wasteful number, since it uses less digits than its factorization.

222111211001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24844.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 222111211001 its reverse (100112111222), we get a palindrome (322223322223).

The spelling of 222111211001 in words is "two hundred twenty-two billion, one hundred eleven million, two hundred eleven thousand, one".