12121001011009 has 4 divisors (see below), whose sum is σ = 13222910193840. Its totient is φ = 11019091828180.

The previous prime is 12121001010967. The next prime is 12121001011033. The reversal of 12121001011009 is 90011010012121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12121001011009 - 2²¹ = 12120998913857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12121001011039) 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, 550954591399 + ... + 550954591420.

It is an arithmetic number, because the mean of its divisors is an integer number (3305727548460).

Almost surely, 2^{12121001011009} is an apocalyptic number.

It is an amenable number.

12121001011009 is a deficient number, since it is larger than the sum of its proper divisors (1101909182831).

12121001011009 is a wasteful number, since it uses less digits than its factorization.

12121001011009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101909182830.

The product of its (nonzero) digits is 36, while the sum is 19.

The spelling of 12121001011009 in words is "twelve trillion, one hundred twenty-one billion, one million, eleven thousand, nine".