20121232349 has 2 divisors, whose sum is σ = 20121232350. Its totient is φ = 20121232348.

The previous prime is 20121232331. The next prime is 20121232357. The reversal of 20121232349 is 94323212102.

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., 19650993124 + 470239225 = 140182^2 + 21685^2 .

It is a cyclic number.

It is not a de Polignac number, because 20121232349 - 2²⁰ = 20120183773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20121232379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060616174 + 10060616175.

It is an arithmetic number, because the mean of its divisors is an integer number (10060616175).

Almost surely, 2^20121232349 is an apocalyptic number.

It is an amenable number.

20121232349 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121232349 is an equidigital number, since it uses as much as digits as its factorization.

20121232349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 20121232349 in words is "twenty billion, one hundred twenty-one million, two hundred thirty-two thousand, three hundred forty-nine".