221212122200012 has 12 divisors (see below), whose sum is σ = 387128160236496. Its totient is φ = 110604076418160.

The previous prime is 221212122199961. The next prime is 221212122200051. The reversal of 221212122200012 is 210002221212122.

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, 495919664 + ... + 496365527.

It is an arithmetic number, because the mean of its divisors is an integer number (32260680019708).

Almost surely, 2^{221212122200012} is an apocalyptic number.

It is an amenable number.

221212122200012 is a deficient number, since it is larger than the sum of its proper divisors (165916038036484).

221212122200012 is a wasteful number, since it uses less digits than its factorization.

221212122200012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992340928 (or 992340926 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221212122200012 its reverse (210002221212122), we get a palindrome (431214343412134).

The spelling of 221212122200012 in words is "two hundred twenty-one trillion, two hundred twelve billion, one hundred twenty-two million, two hundred thousand, twelve".