20121200789 has 2 divisors, whose sum is σ = 20121200790. Its totient is φ = 20121200788.

The previous prime is 20121200747. The next prime is 20121200831. The reversal of 20121200789 is 98700212102.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (20121200747) and next prime (20121200831).

It can be written as a sum of positive squares in only one way, i.e., 17760892900 + 2360307889 = 133270^2 + 48583^2 .

It is a cyclic number.

It is not a de Polignac number, because 20121200789 - 2¹⁶ = 20121135253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20121200719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060600394 + 10060600395.

It is an arithmetic number, because the mean of its divisors is an integer number (10060600395).

Almost surely, 2^20121200789 is an apocalyptic number.

It is an amenable number.

20121200789 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121200789 is an equidigital number, since it uses as much as digits as its factorization.

20121200789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 32.

The spelling of 20121200789 in words is "twenty billion, one hundred twenty-one million, two hundred thousand, seven hundred eighty-nine".