20121122212031 has 2 divisors, whose sum is σ = 20121122212032. Its totient is φ = 20121122212030.

The previous prime is 20121122212027. The next prime is 20121122212069. The reversal of 20121122212031 is 13021222112102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20121122212031 - 2² = 20121122212027 is a prime.

It is a super-2 number, since 2×20121122212031² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20121122211994 and 20121122212012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20121122212021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060561106015 + 10060561106016.

It is an arithmetic number, because the mean of its divisors is an integer number (10060561106016).

Almost surely, 2^{20121122212031} is an apocalyptic number.

20121122212031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121122212031 is an equidigital number, since it uses as much as digits as its factorization.

20121122212031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 20121122212031 its reverse (13021222112102), we get a palindrome (33142344324133).

The spelling of 20121122212031 in words is "twenty trillion, one hundred twenty-one billion, one hundred twenty-two million, two hundred twelve thousand, thirty-one".