221221100120012 has 12 divisors (see below), whose sum is σ = 389142816015576. Its totient is φ = 110037438401280.

The previous prime is 221221100119933. The next prime is 221221100120063. The reversal of 221221100120012 is 210021001122122.

221221100120012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 143277913814 + ... + 143277915357.

It is an arithmetic number, because the mean of its divisors is an integer number (32428568001298).

Almost surely, 2^{221221100120012} is an apocalyptic number.

It is an amenable number.

221221100120012 is a deficient number, since it is larger than the sum of its proper divisors (167921715895564).

221221100120012 is a wasteful number, since it uses less digits than its factorization.

221221100120012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286555829368 (or 286555829366 counting only the distinct ones).

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

Adding to 221221100120012 its reverse (210021001122122), we get a palindrome (431242101242134).

The spelling of 221221100120012 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, one hundred million, one hundred twenty thousand, twelve".