221021111082010 has 16 divisors (see below), whose sum is σ = 410671483817472. Its totient is φ = 85556559128400.

The previous prime is 221021111082007. The next prime is 221021111082011. The reversal of 221021111082010 is 10280111120122.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (221021111082011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 356485662726 + ... + 356485663345.

It is an arithmetic number, because the mean of its divisors is an integer number (25666967738592).

Almost surely, 2^{221021111082010} is an apocalyptic number.

221021111082010 is a deficient number, since it is larger than the sum of its proper divisors (189650372735462).

221021111082010 is a wasteful number, since it uses less digits than its factorization.

221021111082010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712971326109.

The product of its (nonzero) digits is 128, while the sum is 22.

The spelling of 221021111082010 in words is "two hundred twenty-one trillion, twenty-one billion, one hundred eleven million, eighty-two thousand, ten".