123101212331 has 4 divisors (see below), whose sum is σ = 123257631432. Its totient is φ = 122944793232.

The previous prime is 123101212307. The next prime is 123101212337. The reversal of 123101212331 is 133212101321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133212101321 = 13 ⋅10247084717.

It is a cyclic number.

It is not a de Polignac number, because 123101212331 - 2¹⁸ = 123100950187 is a prime.

It is a super-2 number, since 2×123101212331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123101212337) 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, 78208370 + ... + 78209943.

It is an arithmetic number, because the mean of its divisors is an integer number (30814407858).

Almost surely, 2^123101212331 is an apocalyptic number.

123101212331 is a deficient number, since it is larger than the sum of its proper divisors (156419101).

123101212331 is an equidigital number, since it uses as much as digits as its factorization.

123101212331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156419100.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 123101212331 its reverse (133212101321), we get a palindrome (256313313652).

The spelling of 123101212331 in words is "one hundred twenty-three billion, one hundred one million, two hundred twelve thousand, three hundred thirty-one".