231122213101 has 4 divisors (see below), whose sum is σ = 248900844892. Its totient is φ = 213343581312.

The previous prime is 231122213087. The next prime is 231122213107. The reversal of 231122213101 is 101312221132.

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 151387137225 + 79735075876 = 389085^2 + 282374^2 .

It is a cyclic number.

It is not a de Polignac number, because 231122213101 - 2⁷ = 231122212973 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 (231122213107) 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, 8889315876 + ... + 8889315901.

It is an arithmetic number, because the mean of its divisors is an integer number (62225211223).

Almost surely, 2^231122213101 is an apocalyptic number.

It is an amenable number.

231122213101 is a deficient number, since it is larger than the sum of its proper divisors (17778631791).

231122213101 is a wasteful number, since it uses less digits than its factorization.

231122213101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17778631790.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 231122213101 its reverse (101312221132), we get a palindrome (332434434233).

The spelling of 231122213101 in words is "two hundred thirty-one billion, one hundred twenty-two million, two hundred thirteen thousand, one hundred one".