1022121999049 has 2 divisors, whose sum is σ = 1022121999050. Its totient is φ = 1022121999048.

The previous prime is 1022121999043. The next prime is 1022121999079. The reversal of 1022121999049 is 9409991212201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 561750250000 + 460371749049 = 749500^2 + 678507^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022121999049 - 2⁹ = 1022121998537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1022121998993 and 1022121999011.

It is not a weakly prime, because it can be changed into another prime (1022121999043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511060999524 + 511060999525.

It is an arithmetic number, because the mean of its divisors is an integer number (511060999525).

Almost surely, 2^{1022121999049} is an apocalyptic number.

It is an amenable number.

1022121999049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022121999049 is an equidigital number, since it uses as much as digits as its factorization.

1022121999049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 49.

The spelling of 1022121999049 in words is "one trillion, twenty-two billion, one hundred twenty-one million, nine hundred ninety-nine thousand, forty-nine".