221211122000012 has 24 divisors (see below), whose sum is σ = 391802894540400. Its totient is φ = 109267569418176.

The previous prime is 221211121999999. The next prime is 221211122000021. The reversal of 221211122000012 is 210000221112122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9707087 + ... + 23165702.

It is an arithmetic number, because the mean of its divisors is an integer number (16325120605850).

Almost surely, 2^{221211122000012} is an apocalyptic number.

It is an amenable number.

221211122000012 is a deficient number, since it is larger than the sum of its proper divisors (170591772540388).

221211122000012 is a wasteful number, since it uses less digits than its factorization.

221211122000012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32893145 (or 32893143 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221211122000012 its reverse (210000221112122), we get a palindrome (431211343112134).

The spelling of 221211122000012 in words is "two hundred twenty-one trillion, two hundred eleven billion, one hundred twenty-two million, twelve", and thus it is an aban number.