20123211029 has 2 divisors, whose sum is σ = 20123211030. Its totient is φ = 20123211028.

The previous prime is 20123211019. The next prime is 20123211067. The reversal of 20123211029 is 92011232102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19881564004 + 241647025 = 141002^2 + 15545^2 .

It is a cyclic number.

It is not a de Polignac number, because 20123211029 - 2²⁸ = 19854775573 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20123210995 and 20123211013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20123211019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061605514 + 10061605515.

It is an arithmetic number, because the mean of its divisors is an integer number (10061605515).

Almost surely, 2^20123211029 is an apocalyptic number.

It is an amenable number.

20123211029 is a deficient number, since it is larger than the sum of its proper divisors (1).

20123211029 is an equidigital number, since it uses as much as digits as its factorization.

20123211029 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 23.

The spelling of 20123211029 in words is "twenty billion, one hundred twenty-three million, two hundred eleven thousand, twenty-nine".