912212001221 has 32 divisors (see below), whose sum is σ = 1001598998400. Its totient is φ = 827467280640.

The previous prime is 912212001187. The next prime is 912212001223. The reversal of 912212001221 is 122100212219.

It is a cyclic number.

It is not a de Polignac number, because 912212001221 - 2⁶ = 912212001157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (912212001223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 135480371 + ... + 135487103.

It is an arithmetic number, because the mean of its divisors is an integer number (31299968700).

Almost surely, 2^912212001221 is an apocalyptic number.

It is an amenable number.

912212001221 is a deficient number, since it is larger than the sum of its proper divisors (89386997179).

912212001221 is a wasteful number, since it uses less digits than its factorization.

912212001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8789.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 912212001221 in words is "nine hundred twelve billion, two hundred twelve million, one thousand, two hundred twenty-one".