122031213121 has 2 divisors, whose sum is σ = 122031213122. Its totient is φ = 122031213120.

The previous prime is 122031213119. The next prime is 122031213131. The reversal of 122031213121 is 121312130221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66648650896 + 55382562225 = 258164^2 + 235335^2 .

It is a cyclic number.

It is not a de Polignac number, because 122031213121 - 2¹ = 122031213119 is a prime.

Together with 122031213119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (122031213131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61015606560 + 61015606561.

It is an arithmetic number, because the mean of its divisors is an integer number (61015606561).

Almost surely, 2^122031213121 is an apocalyptic number.

It is an amenable number.

122031213121 is a deficient number, since it is larger than the sum of its proper divisors (1).

122031213121 is an equidigital number, since it uses as much as digits as its factorization.

122031213121 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 122031213121 its reverse (121312130221), we get a palindrome (243343343342).

The spelling of 122031213121 in words is "one hundred twenty-two billion, thirty-one million, two hundred thirteen thousand, one hundred twenty-one".