31210121029 has 2 divisors, whose sum is σ = 31210121030. Its totient is φ = 31210121028.

The previous prime is 31210121027. The next prime is 31210121051. The reversal of 31210121029 is 92012101213.

It is an a-pointer prime, because the next prime (31210121051) can be obtained adding 31210121029 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30119602500 + 1090518529 = 173550^2 + 33023^2 .

It is a cyclic number.

It is not a de Polignac number, because 31210121029 - 2¹ = 31210121027 is a prime.

Together with 31210121027, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31210121027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15605060514 + 15605060515.

It is an arithmetic number, because the mean of its divisors is an integer number (15605060515).

Almost surely, 2^31210121029 is an apocalyptic number.

It is an amenable number.

31210121029 is a deficient number, since it is larger than the sum of its proper divisors (1).

31210121029 is an equidigital number, since it uses as much as digits as its factorization.

31210121029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 22.

The spelling of 31210121029 in words is "thirty-one billion, two hundred ten million, one hundred twenty-one thousand, twenty-nine".