1212102091 has 8 divisors (see below), whose sum is σ = 1284598224. Its totient is φ = 1139738880.

The previous prime is 1212102083. The next prime is 1212102109. The reversal of 1212102091 is 1902012121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1212102091 - 2³ = 1212102083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212102041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14130 + ... + 51223.

It is an arithmetic number, because the mean of its divisors is an integer number (160574778).

Almost surely, 2^1212102091 is an apocalyptic number.

1212102091 is a deficient number, since it is larger than the sum of its proper divisors (72496133).

1212102091 is a wasteful number, since it uses less digits than its factorization.

1212102091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66461.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 1212102091 is about 34815.2565838599. The cubic root of 1212102091 is about 1066.2189576944.

The spelling of 1212102091 in words is "one billion, two hundred twelve million, one hundred two thousand, ninety-one".