20121212407 has 2 divisors, whose sum is σ = 20121212408. Its totient is φ = 20121212406.

The previous prime is 20121212351. The next prime is 20121212413. The reversal of 20121212407 is 70421212102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20121212407 is a prime.

It is a super-2 number, since 2×20121212407² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20121212467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060606203 + 10060606204.

It is an arithmetic number, because the mean of its divisors is an integer number (10060606204).

Almost surely, 2^20121212407 is an apocalyptic number.

20121212407 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121212407 is an equidigital number, since it uses as much as digits as its factorization.

20121212407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 22.

Adding to 20121212407 its reverse (70421212102), we get a palindrome (90542424509).

The spelling of 20121212407 in words is "twenty billion, one hundred twenty-one million, two hundred twelve thousand, four hundred seven".