123021211231 has 2 divisors, whose sum is σ = 123021211232. Its totient is φ = 123021211230.

The previous prime is 123021211217. The next prime is 123021211241. The reversal of 123021211231 is 132112120321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123021211231 - 2¹¹ = 123021209183 is a prime.

It is a super-2 number, since 2×123021211231² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123021211199 and 123021211208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123021211241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61510605615 + 61510605616.

It is an arithmetic number, because the mean of its divisors is an integer number (61510605616).

Almost surely, 2^123021211231 is an apocalyptic number.

123021211231 is a deficient number, since it is larger than the sum of its proper divisors (1).

123021211231 is an equidigital number, since it uses as much as digits as its factorization.

123021211231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 123021211231 its reverse (132112120321), we get a palindrome (255133331552).

The spelling of 123021211231 in words is "one hundred twenty-three billion, twenty-one million, two hundred eleven thousand, two hundred thirty-one".