12120021111001 has 8 divisors (see below), whose sum is σ = 12183808955904. Its totient is φ = 12056236727280.

The previous prime is 12120021110933. The next prime is 12120021111091. The reversal of 12120021111001 is 10011112002121.

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 12120021111001 - 2¹⁵ = 12120021078233 is a prime.

It is a super-2 number, since 2×12120021111001² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12120021111091) 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, 6312795 + ... + 8005711.

It is an arithmetic number, because the mean of its divisors is an integer number (1522976119488).

Almost surely, 2^{12120021111001} is an apocalyptic number.

It is an amenable number.

12120021111001 is a deficient number, since it is larger than the sum of its proper divisors (63787844903).

12120021111001 is a wasteful number, since it uses less digits than its factorization.

12120021111001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1730591.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 12120021111001 its reverse (10011112002121), we get a palindrome (22131133113122).

The spelling of 12120021111001 in words is "twelve trillion, one hundred twenty billion, twenty-one million, one hundred eleven thousand, one".