20122121012069 has 2 divisors, whose sum is σ = 20122121012070. Its totient is φ = 20122121012068.

The previous prime is 20122121011991. The next prime is 20122121012083. The reversal of 20122121012069 is 96021012122102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19175903740900 + 946217271169 = 4379030^2 + 972737^2 .

It is a cyclic number.

It is not a de Polignac number, because 20122121012069 - 2⁸ = 20122121011813 is a prime.

It is a super-2 number, since 2×20122121012069² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20122121012089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061060506034 + 10061060506035.

It is an arithmetic number, because the mean of its divisors is an integer number (10061060506035).

Almost surely, 2^{20122121012069} is an apocalyptic number.

It is an amenable number.

20122121012069 is a deficient number, since it is larger than the sum of its proper divisors (1).

20122121012069 is an equidigital number, since it uses as much as digits as its factorization.

20122121012069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 29.

The spelling of 20122121012069 in words is "twenty trillion, one hundred twenty-two billion, one hundred twenty-one million, twelve thousand, sixty-nine".