1211222131019 has 2 divisors, whose sum is σ = 1211222131020. Its totient is φ = 1211222131018.

The previous prime is 1211222130997. The next prime is 1211222131043. The reversal of 1211222131019 is 9101312221121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1211222131019 - 2³² = 1206927163723 is a prime.

It is a super-2 number, since 2×1211222131019² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1211222131079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605611065509 + 605611065510.

It is an arithmetic number, because the mean of its divisors is an integer number (605611065510).

Almost surely, 2^{1211222131019} is an apocalyptic number.

1211222131019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211222131019 is an equidigital number, since it uses as much as digits as its factorization.

1211222131019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 26.

The spelling of 1211222131019 in words is "one trillion, two hundred eleven billion, two hundred twenty-two million, one hundred thirty-one thousand, nineteen".