221457510212 has 12 divisors (see below), whose sum is σ = 400052276736. Its totient is φ = 107156859720.

The previous prime is 221457510203. The next prime is 221457510277. The reversal of 221457510212 is 212015754122.

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, 892973708 + ... + 892973955.

It is an arithmetic number, because the mean of its divisors is an integer number (33337689728).

Almost surely, 2^221457510212 is an apocalyptic number.

It is an amenable number.

221457510212 is a deficient number, since it is larger than the sum of its proper divisors (178594766524).

221457510212 is a wasteful number, since it uses less digits than its factorization.

221457510212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1785947698 (or 1785947696 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 32.

It can be divided in two parts, 22145 and 7510212, that added together give a palindrome (7532357).

The spelling of 221457510212 in words is "two hundred twenty-one billion, four hundred fifty-seven million, five hundred ten thousand, two hundred twelve".