221111211020010 has 32 divisors (see below), whose sum is σ = 530686420371072. Its totient is φ = 58960821391680.

The previous prime is 221111211019997. The next prime is 221111211020041. The reversal of 221111211020010 is 10020112111122.

It is a happy number.

221111211020010 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 134683846 + ... + 136315665.

It is an arithmetic number, because the mean of its divisors is an integer number (16583950636596).

Almost surely, 2^{221111211020010} is an apocalyptic number.

221111211020010 is an abundant number, since it is smaller than the sum of its proper divisors (309575209351062).

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

221111211020010 is a wasteful number, since it uses less digits than its factorization.

221111211020010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271026718.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 221111211020010 its reverse (10020112111122), we get a palindrome (231131323131132).

The spelling of 221111211020010 in words is "two hundred twenty-one trillion, one hundred eleven billion, two hundred eleven million, twenty thousand, ten".