12011010121 has 8 divisors (see below), whose sum is σ = 13103797824. Its totient is φ = 10918368720.

The previous prime is 12011010107. The next prime is 12011010133. The reversal of 12011010121 is 12101011021.

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 12011010121 - 2¹⁵ = 12010977353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12011010098 and 12011010107.

It is not an unprimeable number, because it can be changed into a prime (12011010161) 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, 203815 + ... + 256051.

It is an arithmetic number, because the mean of its divisors is an integer number (1637974728).

Almost surely, 2^12011010121 is an apocalyptic number.

12011010121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12011010121 is a deficient number, since it is larger than the sum of its proper divisors (1092787703).

12011010121 is a wasteful number, since it uses less digits than its factorization.

12011010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73151.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 12011010121 its reverse (12101011021), we get a palindrome (24112021142).

The spelling of 12011010121 in words is "twelve billion, eleven million, ten thousand, one hundred twenty-one".