1211012321099 has 32 divisors (see below), whose sum is σ = 1470378147840. Its totient is φ = 974913600672.

The previous prime is 1211012321083. The next prime is 1211012321117. The reversal of 1211012321099 is 9901232101121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1211012321099 - 2⁴ = 1211012321083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211012321599) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8123774 + ... + 8271500.

It is an arithmetic number, because the mean of its divisors is an integer number (45949317120).

Almost surely, 2^{1211012321099} is an apocalyptic number.

1211012321099 is a deficient number, since it is larger than the sum of its proper divisors (259365826741).

1211012321099 is a wasteful number, since it uses less digits than its factorization.

1211012321099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148679.

The product of its (nonzero) digits is 1944, while the sum is 32.

The spelling of 1211012321099 in words is "one trillion, two hundred eleven billion, twelve million, three hundred twenty-one thousand, ninety-nine".