1221010223012 has 12 divisors (see below), whose sum is σ = 2249229358320. Its totient is φ = 578373263496.

The previous prime is 1221010223003. The next prime is 1221010223033. The reversal of 1221010223012 is 2103220101221.

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, 8032961918 + ... + 8032962069.

It is an arithmetic number, because the mean of its divisors is an integer number (187435779860).

Almost surely, 2^{1221010223012} is an apocalyptic number.

It is an amenable number.

1221010223012 is a deficient number, since it is larger than the sum of its proper divisors (1028219135308).

1221010223012 is a wasteful number, since it uses less digits than its factorization.

1221010223012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16065924010 (or 16065924008 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1221010223012 its reverse (2103220101221), we get a palindrome (3324230324233).

The spelling of 1221010223012 in words is "one trillion, two hundred twenty-one billion, ten million, two hundred twenty-three thousand, twelve".