123010021311 has 4 divisors (see below), whose sum is σ = 164013361752. Its totient is φ = 82006680872.

The previous prime is 123010021273. The next prime is 123010021333. The reversal of 123010021311 is 113120010321.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123010021311 - 2⁶ = 123010021247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123010021111) 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, 20501670216 + ... + 20501670221.

It is an arithmetic number, because the mean of its divisors is an integer number (41003340438).

Almost surely, 2^123010021311 is an apocalyptic number.

123010021311 is a deficient number, since it is larger than the sum of its proper divisors (41003340441).

123010021311 is an equidigital number, since it uses as much as digits as its factorization.

123010021311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41003340440.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 123010021311 its reverse (113120010321), we get a palindrome (236130031632).

The spelling of 123010021311 in words is "one hundred twenty-three billion, ten million, twenty-one thousand, three hundred eleven".