1211001099907 has 4 divisors (see below), whose sum is σ = 1211004064000. Its totient is φ = 1210998135816.

The previous prime is 1211001099883. The next prime is 1211001099929. The reversal of 1211001099907 is 7099901001121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211001099907 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1211001099907.

It is not an unprimeable number, because it can be changed into a prime (1211001099947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 748032 + ... + 1726717.

It is an arithmetic number, because the mean of its divisors is an integer number (302751016000).

Almost surely, 2^{1211001099907} is an apocalyptic number.

1211001099907 is a deficient number, since it is larger than the sum of its proper divisors (2964093).

1211001099907 is an equidigital number, since it uses as much as digits as its factorization.

1211001099907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2964092.

The product of its (nonzero) digits is 10206, while the sum is 40.

The spelling of 1211001099907 in words is "one trillion, two hundred eleven billion, one million, ninety-nine thousand, nine hundred seven".