221111020010 has 16 divisors (see below), whose sum is σ = 399279583872. Its totient is φ = 88160019600.

The previous prime is 221111020003. The next prime is 221111020021. The reversal of 221111020010 is 10020111122.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 221111019973 and 221111020000.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35545286 + ... + 35551505.

It is an arithmetic number, because the mean of its divisors is an integer number (24954973992).

Almost surely, 2^221111020010 is an apocalyptic number.

221111020010 is a deficient number, since it is larger than the sum of its proper divisors (178168563862).

221111020010 is a wasteful number, since it uses less digits than its factorization.

221111020010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71097109.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 221111020010 its reverse (10020111122), we get a palindrome (231131131132).

The spelling of 221111020010 in words is "two hundred twenty-one billion, one hundred eleven million, twenty thousand, ten".