221001211110212 has 12 divisors (see below), whose sum is σ = 416502282477036. Its totient is φ = 102000558973920.

The previous prime is 221001211110161. The next prime is 221001211110257. The reversal of 221001211110212 is 212011112100122.

It can be written as a sum of positive squares in 2 ways, for example, as 46544241207556 + 174456969902656 = 6822334^2 + 13208216^2 .

It is a super-2 number, since 2×221001211110212² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2125011645239 + ... + 2125011645342.

It is an arithmetic number, because the mean of its divisors is an integer number (34708523539753).

Almost surely, 2^{221001211110212} is an apocalyptic number.

It is an amenable number.

221001211110212 is a deficient number, since it is larger than the sum of its proper divisors (195501071366824).

221001211110212 is a wasteful number, since it uses less digits than its factorization.

221001211110212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4250023290598 (or 4250023290596 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 221001211110212 its reverse (212011112100122), we get a palindrome (433012323210334).

The spelling of 221001211110212 in words is "two hundred twenty-one trillion, one billion, two hundred eleven million, one hundred ten thousand, two hundred twelve".