1231322022121 has 2 divisors, whose sum is σ = 1231322022122. Its totient is φ = 1231322022120.

The previous prime is 1231322022103. The next prime is 1231322022191. The reversal of 1231322022121 is 1212202231321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 930539976025 + 300782046096 = 964645^2 + 548436^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231322022121 - 2⁵ = 1231322022089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1231322022092 and 1231322022101.

It is not a weakly prime, because it can be changed into another prime (1231322022101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615661011060 + 615661011061.

It is an arithmetic number, because the mean of its divisors is an integer number (615661011061).

Almost surely, 2^{1231322022121} is an apocalyptic number.

It is an amenable number.

1231322022121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231322022121 is an equidigital number, since it uses as much as digits as its factorization.

1231322022121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 1231322022121 its reverse (1212202231321), we get a palindrome (2443524253442).

The spelling of 1231322022121 in words is "one trillion, two hundred thirty-one billion, three hundred twenty-two million, twenty-two thousand, one hundred twenty-one".