1201121211099 has 8 divisors (see below), whose sum is σ = 1601508677440. Its totient is φ = 800740609416.

The previous prime is 1201121211083. The next prime is 1201121211109. The reversal of 1201121211099 is 9901121211021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1201121211099 - 2⁴ = 1201121211083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201121211019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1292989 + ... + 2018430.

It is an arithmetic number, because the mean of its divisors is an integer number (200188584680).

Almost surely, 2^{1201121211099} is an apocalyptic number.

1201121211099 is a deficient number, since it is larger than the sum of its proper divisors (400387466341).

1201121211099 is a wasteful number, since it uses less digits than its factorization.

1201121211099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3432329.

The product of its (nonzero) digits is 648, while the sum is 30.

The spelling of 1201121211099 in words is "one trillion, two hundred one billion, one hundred twenty-one million, two hundred eleven thousand, ninety-nine".