31234012111 has 2 divisors, whose sum is σ = 31234012112. Its totient is φ = 31234012110.

The previous prime is 31234012091. The next prime is 31234012123. The reversal of 31234012111 is 11121043213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31234012111 - 2¹¹ = 31234010063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31234019111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15617006055 + 15617006056.

It is an arithmetic number, because the mean of its divisors is an integer number (15617006056).

Almost surely, 2^31234012111 is an apocalyptic number.

31234012111 is a deficient number, since it is larger than the sum of its proper divisors (1).

31234012111 is an equidigital number, since it uses as much as digits as its factorization.

31234012111 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 31234012111 its reverse (11121043213), we get a palindrome (42355055324).

The spelling of 31234012111 in words is "thirty-one billion, two hundred thirty-four million, twelve thousand, one hundred eleven".