31301222112101 has 4 divisors (see below), whose sum is σ = 31697440113600. Its totient is φ = 30905004110604.

The previous prime is 31301222112049. The next prime is 31301222112109. The reversal of 31301222112101 is 10121122210313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31301222112101 is a prime.

It is a super-2 number, since 2×31301222112101² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31301222112109) 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, 198109000631 + ... + 198109000788.

It is an arithmetic number, because the mean of its divisors is an integer number (7924360028400).

Almost surely, 2^{31301222112101} is an apocalyptic number.

It is an amenable number.

31301222112101 is a deficient number, since it is larger than the sum of its proper divisors (396218001499).

31301222112101 is an equidigital number, since it uses as much as digits as its factorization.

31301222112101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396218001498.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 31301222112101 its reverse (10121122210313), we get a palindrome (41422344322414).

The spelling of 31301222112101 in words is "thirty-one trillion, three hundred one billion, two hundred twenty-two million, one hundred twelve thousand, one hundred one".