221312203113 has 32 divisors (see below), whose sum is σ = 319303213056. Its totient is φ = 135816558848.

The previous prime is 221312203087. The next prime is 221312203121. The reversal of 221312203113 is 311302213122.

It is not a de Polignac number, because 221312203113 - 2³⁷ = 83873249641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221312203113.

It is not an unprimeable number, because it can be changed into a prime (221312203183) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3620320 + ... + 3680942.

It is an arithmetic number, because the mean of its divisors is an integer number (9978225408).

Almost surely, 2^221312203113 is an apocalyptic number.

It is an amenable number.

221312203113 is a deficient number, since it is larger than the sum of its proper divisors (97991009943).

221312203113 is a wasteful number, since it uses less digits than its factorization.

221312203113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62213.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 221312203113 its reverse (311302213122), we get a palindrome (532614416235).

The spelling of 221312203113 in words is "two hundred twenty-one billion, three hundred twelve million, two hundred three thousand, one hundred thirteen".