221131111111210 has 64 divisors (see below), whose sum is σ = 416268072912384. Its totient is φ = 84418046099200.

The previous prime is 221131111111201. The next prime is 221131111111231. The reversal of 221131111111210 is 12111111131122.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2071878867 + ... + 2071985593.

It is an arithmetic number, because the mean of its divisors is an integer number (6504188639256).

Almost surely, 2^{221131111111210} is an apocalyptic number.

221131111111210 is a deficient number, since it is larger than the sum of its proper divisors (195136961801174).

221131111111210 is a wasteful number, since it uses less digits than its factorization.

221131111111210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126759.

The product of its (nonzero) digits is 24, while the sum is 19.

Adding to 221131111111210 its reverse (12111111131122), we get a palindrome (233242222242332).

The spelling of 221131111111210 in words is "two hundred twenty-one trillion, one hundred thirty-one billion, one hundred eleven million, one hundred eleven thousand, two hundred ten".