221101402312 has 64 divisors (see below), whose sum is σ = 492753600000. Its totient is φ = 91029609216.

The previous prime is 221101402261. The next prime is 221101402343. The reversal of 221101402312 is 213204101122.

It is a self number, because there is not a number n which added to its sum of digits gives 221101402312.

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, 511687 + ... + 839062.

It is an arithmetic number, because the mean of its divisors is an integer number (7699275000).

Almost surely, 2^221101402312 is an apocalyptic number.

It is an amenable number.

221101402312 is an abundant number, since it is smaller than the sum of its proper divisors (271652197688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221101402312 is a wasteful number, since it uses less digits than its factorization.

221101402312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1350878 (or 1350874 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 221101402312 its reverse (213204101122), we get a palindrome (434305503434).

The spelling of 221101402312 in words is "two hundred twenty-one billion, one hundred one million, four hundred two thousand, three hundred twelve".