101211312123 has 12 divisors (see below), whose sum is σ = 147125292288. Its totient is φ = 67044435120.

The previous prime is 101211312119. The next prime is 101211312151. The reversal of 101211312123 is 321213112101.

It is not a de Polignac number, because 101211312123 - 2² = 101211312119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 101211312096 and 101211312105.

It is not an unprimeable number, because it can be changed into a prime (101211312623) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35812923 + ... + 35815748.

It is an arithmetic number, because the mean of its divisors is an integer number (12260441024).

Almost surely, 2^101211312123 is an apocalyptic number.

101211312123 is a deficient number, since it is larger than the sum of its proper divisors (45913980165).

101211312123 is a wasteful number, since it uses less digits than its factorization.

101211312123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71628834 (or 71628831 counting only the distinct ones).

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

Adding to 101211312123 its reverse (321213112101), we get a palindrome (422424424224).

The spelling of 101211312123 in words is "one hundred one billion, two hundred eleven million, three hundred twelve thousand, one hundred twenty-three".