221021121010011 has 16 divisors (see below), whose sum is σ = 351437310426624. Its totient is φ = 120806575458624.

The previous prime is 221021121009937. The next prime is 221021121010111. The reversal of 221021121010011 is 110010121120122.

It is a happy number.

It is not a de Polignac number, because 221021121010011 - 2¹⁷ = 221021120878939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221021121010111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 228800331826 + ... + 228800332791.

It is an arithmetic number, because the mean of its divisors is an integer number (21964831901664).

Almost surely, 2^{221021121010011} is an apocalyptic number.

221021121010011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

221021121010011 is a deficient number, since it is larger than the sum of its proper divisors (130416189416613).

221021121010011 is a wasteful number, since it uses less digits than its factorization.

221021121010011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457600664650.

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

Adding to 221021121010011 its reverse (110010121120122), we get a palindrome (331031242130133).

The spelling of 221021121010011 in words is "two hundred twenty-one trillion, twenty-one billion, one hundred twenty-one million, ten thousand, eleven".