221400233101 has 4 divisors (see below), whose sum is σ = 221485095900. Its totient is φ = 221315370304.

The previous prime is 221400233081. The next prime is 221400233107. The reversal of 221400233101 is 101332004122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 181028975625 + 40371257476 = 425475^2 + 200926^2 .

It is a cyclic number.

It is not a de Polignac number, because 221400233101 - 2⁵ = 221400233069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221400233107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42427486 + ... + 42432703.

It is an arithmetic number, because the mean of its divisors is an integer number (55371273975).

Almost surely, 2^221400233101 is an apocalyptic number.

It is an amenable number.

221400233101 is a deficient number, since it is larger than the sum of its proper divisors (84862799).

221400233101 is an equidigital number, since it uses as much as digits as its factorization.

221400233101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84862798.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 221400233101 its reverse (101332004122), we get a palindrome (322732237223).

The spelling of 221400233101 in words is "two hundred twenty-one billion, four hundred million, two hundred thirty-three thousand, one hundred one".