123101220111 has 32 divisors (see below), whose sum is σ = 174953264640. Its totient is φ = 76844267136.

The previous prime is 123101220049. The next prime is 123101220113. The reversal of 123101220111 is 111022101321.

It is not a de Polignac number, because 123101220111 - 2⁹ = 123101219599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123101220113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 925950 + ... + 1050516.

It is an arithmetic number, because the mean of its divisors is an integer number (5467289520).

Almost surely, 2^123101220111 is an apocalyptic number.

123101220111 is a deficient number, since it is larger than the sum of its proper divisors (51852044529).

123101220111 is a wasteful number, since it uses less digits than its factorization.

123101220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124943.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 123101220111 its reverse (111022101321), we get a palindrome (234123321432).

The spelling of 123101220111 in words is "one hundred twenty-three billion, one hundred one million, two hundred twenty thousand, one hundred eleven".