131101212123 has 48 divisors (see below), whose sum is σ = 234194827776. Its totient is φ = 71657784000.

The previous prime is 131101212097. The next prime is 131101212131. The reversal of 131101212123 is 321212101131.

It is not a de Polignac number, because 131101212123 - 2⁸ = 131101211867 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131101212096 and 131101212105.

It is not an unprimeable number, because it can be changed into a prime (131101212133) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1636378 + ... + 1714623.

It is an arithmetic number, because the mean of its divisors is an integer number (4879058912).

Almost surely, 2^131101212123 is an apocalyptic number.

131101212123 is a deficient number, since it is larger than the sum of its proper divisors (103093615653).

131101212123 is an equidigital number, since it uses as much as digits as its factorization.

131101212123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3351046 (or 3351034 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 131101212123 its reverse (321212101131), we get a palindrome (452313313254).

The spelling of 131101212123 in words is "one hundred thirty-one billion, one hundred one million, two hundred twelve thousand, one hundred twenty-three".