221212122100012 has 48 divisors (see below), whose sum is σ = 400344179558400. Its totient is φ = 106841223290880.

The previous prime is 221212122100003. The next prime is 221212122100031. The reversal of 221212122100012 is 210001221212122.

221212122100012 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 15 ways as a sum of consecutive naturals, for example, 1203397164 + ... + 1203580972.

It is an arithmetic number, because the mean of its divisors is an integer number (8340503740800).

Almost surely, 2^{221212122100012} is an apocalyptic number.

It is an amenable number.

221212122100012 is a deficient number, since it is larger than the sum of its proper divisors (179132057458388).

221212122100012 is a wasteful number, since it uses less digits than its factorization.

221212122100012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201646 (or 201644 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221212122100012 its reverse (210001221212122), we get a palindrome (431213343312134).

The spelling of 221212122100012 in words is "two hundred twenty-one trillion, two hundred twelve billion, one hundred twenty-two million, one hundred thousand, twelve".