1212101020091 has 16 divisors (see below), whose sum is σ = 1314032848800. Its totient is φ = 1111415205888.

The previous prime is 1212101020087. The next prime is 1212101020093. The reversal of 1212101020091 is 1900201012121.

It is not a de Polignac number, because 1212101020091 - 2² = 1212101020087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212101020093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7139195 + ... + 7307003.

It is an arithmetic number, because the mean of its divisors is an integer number (82127053050).

Almost surely, 2^{1212101020091} is an apocalyptic number.

1212101020091 is a deficient number, since it is larger than the sum of its proper divisors (101931828709).

1212101020091 is a wasteful number, since it uses less digits than its factorization.

1212101020091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171518.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 1212101020091 in words is "one trillion, two hundred twelve billion, one hundred one million, twenty thousand, ninety-one".