221012002221012 has 36 divisors (see below), whose sum is σ = 558792039687700. Its totient is φ = 73654472437632.

The previous prime is 221012002221011. The next prime is 221012002221019. The reversal of 221012002221012 is 210122200210122.

It is a happy number.

221012002221012 is a `hidden beast` number, since 221 + 0 + 1 + 200 + 22 + 210 + 12 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 113219516697156 + 107792485523856 = 10640466^2 + 10382316^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×221012002221012² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221012002221011) 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, 674624353 + ... + 674951880.

Almost surely, 2^{221012002221012} is an apocalyptic number.

It is an amenable number.

221012002221012 is an abundant number, since it is smaller than the sum of its proper divisors (337780037466688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221012002221012 is a wasteful number, since it uses less digits than its factorization.

221012002221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1349580792 (or 1349580787 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221012002221012 its reverse (210122200210122), we get a palindrome (431134202431134).

The spelling of 221012002221012 in words is "two hundred twenty-one trillion, twelve billion, two million, two hundred twenty-one thousand, twelve".