20121112069 has 2 divisors, whose sum is σ = 20121112070. Its totient is φ = 20121112068.

The previous prime is 20121111979. The next prime is 20121112097. The reversal of 20121112069 is 96021112102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19779047044 + 342065025 = 140638^2 + 18495^2 .

It is a cyclic number.

It is not a de Polignac number, because 20121112069 - 2²⁷ = 19986894341 is a prime.

It is a super-2 number, since 2×20121112069² (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 (20121112769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060556034 + 10060556035.

It is an arithmetic number, because the mean of its divisors is an integer number (10060556035).

Almost surely, 2^20121112069 is an apocalyptic number.

It is an amenable number.

20121112069 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121112069 is an equidigital number, since it uses as much as digits as its factorization.

20121112069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 25.

The spelling of 20121112069 in words is "twenty billion, one hundred twenty-one million, one hundred twelve thousand, sixty-nine".