1199491521929 has 2 divisors, whose sum is σ = 1199491521930. Its totient is φ = 1199491521928.

The previous prime is 1199491521817. The next prime is 1199491521937. The reversal of 1199491521929 is 9291251949911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 707873187904 + 491618334025 = 841352^2 + 701155^2 .

It is a cyclic number.

It is not a de Polignac number, because 1199491521929 - 2⁸ = 1199491521673 is a prime.

It is a super-2 number, since 2×1199491521929² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1199491527929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599745760964 + 599745760965.

It is an arithmetic number, because the mean of its divisors is an integer number (599745760965).

Almost surely, 2^{1199491521929} is an apocalyptic number.

It is an amenable number.

1199491521929 is a deficient number, since it is larger than the sum of its proper divisors (1).

1199491521929 is an equidigital number, since it uses as much as digits as its factorization.

1199491521929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4723920, while the sum is 62.

The spelling of 1199491521929 in words is "one trillion, one hundred ninety-nine billion, four hundred ninety-one million, five hundred twenty-one thousand, nine hundred twenty-nine".