221111010010 has 32 divisors (see below), whose sum is σ = 434216764800. Its totient is φ = 80397495360.

The previous prime is 221111009971. The next prime is 221111010079. The reversal of 221111010010 is 10010111122.

It is a Harshad number since it is a multiple of its sum of digits (10).

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, 1406971 + ... + 1556209.

It is an arithmetic number, because the mean of its divisors is an integer number (13569273900).

Almost surely, 2^221111010010 is an apocalyptic number.

221111010010 is a deficient number, since it is larger than the sum of its proper divisors (213105754790).

221111010010 is a wasteful number, since it uses less digits than its factorization.

221111010010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162726.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 221111010010 its reverse (10010111122), we get a palindrome (231121121132).

The spelling of 221111010010 in words is "two hundred twenty-one billion, one hundred eleven million, ten thousand, ten".