12021021049 has 2 divisors, whose sum is σ = 12021021050. Its totient is φ = 12021021048.

The previous prime is 12021021031. The next prime is 12021021091. The reversal of 12021021049 is 94012012021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9730441449 + 2290579600 = 98643^2 + 47860^2 .

It is a cyclic number.

It is not a de Polignac number, because 12021021049 - 2⁹ = 12021020537 is a prime.

It is not a weakly prime, because it can be changed into another prime (12021021149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010510524 + 6010510525.

It is an arithmetic number, because the mean of its divisors is an integer number (6010510525).

Almost surely, 2^12021021049 is an apocalyptic number.

It is an amenable number.

12021021049 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021021049 is an equidigital number, since it uses as much as digits as its factorization.

12021021049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 12021021049 in words is "twelve billion, twenty-one million, twenty-one thousand, forty-nine".