12001121121121 has 16 divisors (see below), whose sum is σ = 13716167344128. Its totient is φ = 10400586411600.

The previous prime is 12001121121109. The next prime is 12001121121133. The reversal of 12001121121121 is 12112112110021.

It is an interprime number because it is at equal distance from previous prime (12001121121109) and next prime (12001121121133).

It is not a de Polignac number, because 12001121121121 - 2⁷ = 12001121120993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12001121121095 and 12001121121104.

It is not an unprimeable number, because it can be changed into a prime (12001121121721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 262618225 + ... + 262663918.

It is an arithmetic number, because the mean of its divisors is an integer number (857260459008).

Almost surely, 2^{12001121121121} is an apocalyptic number.

12001121121121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12001121121121 is a deficient number, since it is larger than the sum of its proper divisors (1715046223007).

12001121121121 is a wasteful number, since it uses less digits than its factorization.

12001121121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525282252.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 12001121121121 its reverse (12112112110021), we get a palindrome (24113233231142).

The spelling of 12001121121121 in words is "twelve trillion, one billion, one hundred twenty-one million, one hundred twenty-one thousand, one hundred twenty-one".