20121331207 has 2 divisors, whose sum is σ = 20121331208. Its totient is φ = 20121331206.

The previous prime is 20121331187. The next prime is 20121331211. The reversal of 20121331207 is 70213312102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20121331207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20121331277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060665603 + 10060665604.

It is an arithmetic number, because the mean of its divisors is an integer number (10060665604).

Almost surely, 2^20121331207 is an apocalyptic number.

20121331207 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121331207 is an equidigital number, since it uses as much as digits as its factorization.

20121331207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 22.

Adding to 20121331207 its reverse (70213312102), we get a palindrome (90334643309).

The spelling of 20121331207 in words is "twenty billion, one hundred twenty-one million, three hundred thirty-one thousand, two hundred seven".