1231122040111 has 2 divisors, whose sum is σ = 1231122040112. Its totient is φ = 1231122040110.

The previous prime is 1231122040097. The next prime is 1231122040121. The reversal of 1231122040111 is 1110402211321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1231122040111 - 2¹⁵ = 1231122007343 is a prime.

It is a super-2 number, since 2×1231122040111² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231122040121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615561020055 + 615561020056.

It is an arithmetic number, because the mean of its divisors is an integer number (615561020056).

Almost surely, 2^{1231122040111} is an apocalyptic number.

1231122040111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231122040111 is an equidigital number, since it uses as much as digits as its factorization.

1231122040111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1231122040111 its reverse (1110402211321), we get a palindrome (2341524251432).

The spelling of 1231122040111 in words is "one trillion, two hundred thirty-one billion, one hundred twenty-two million, forty thousand, one hundred eleven".