221112100121001 has 32 divisors (see below), whose sum is σ = 302963749545600. Its totient is φ = 143338997431296.

The previous prime is 221112100120931. The next prime is 221112100121111. The reversal of 221112100121001 is 100121001211122.

It is a happy number.

221112100121001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221112100121001 - 2²¹ = 221112098023849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221112100125001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3326611570 + ... + 3326678036.

It is an arithmetic number, because the mean of its divisors is an integer number (9467617173300).

Almost surely, 2^{221112100121001} is an apocalyptic number.

It is an amenable number.

221112100121001 is a deficient number, since it is larger than the sum of its proper divisors (81851649424599).

221112100121001 is a wasteful number, since it uses less digits than its factorization.

221112100121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83833.

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

Adding to 221112100121001 its reverse (100121001211122), we get a palindrome (321233101332123).

The spelling of 221112100121001 in words is "two hundred twenty-one trillion, one hundred twelve billion, one hundred million, one hundred twenty-one thousand, one".