11221212121009 has 8 divisors (see below), whose sum is σ = 12362523526080. Its totient is φ = 10100100918000.

The previous prime is 11221212120983. The next prime is 11221212121039. The reversal of 11221212121009 is 90012121212211.

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 11221212121009 - 2⁵ = 11221212120977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11221212121039) 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, 5050049349 + ... + 5050051570.

It is an arithmetic number, because the mean of its divisors is an integer number (1545315440760).

Almost surely, 2^{11221212121009} is an apocalyptic number.

It is an amenable number.

11221212121009 is a deficient number, since it is larger than the sum of its proper divisors (1141311405071).

11221212121009 is a wasteful number, since it uses less digits than its factorization.

11221212121009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10100101031.

The product of its (nonzero) digits is 288, while the sum is 25.

It can be divided in two parts, 112212 and 12121009, that added together give a palindrome (12233221).

The spelling of 11221212121009 in words is "eleven trillion, two hundred twenty-one billion, two hundred twelve million, one hundred twenty-one thousand, nine".