12121011801061 has 8 divisors (see below), whose sum is σ = 12258633263360. Its totient is φ = 11983870693872.

The previous prime is 12121011800999. The next prime is 12121011801071. The reversal of 12121011801061 is 16010811012121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12121011801061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121011801071) 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, 120038025 + ... + 120138958.

It is an arithmetic number, because the mean of its divisors is an integer number (1532329157920).

Almost surely, 2^{12121011801061} is an apocalyptic number.

It is an amenable number.

12121011801061 is a deficient number, since it is larger than the sum of its proper divisors (137621462299).

12121011801061 is a wasteful number, since it uses less digits than its factorization.

12121011801061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240177555.

The product of its (nonzero) digits is 192, while the sum is 25.

Adding to 12121011801061 its reverse (16010811012121), we get a palindrome (28131822813182).

The spelling of 12121011801061 in words is "twelve trillion, one hundred twenty-one billion, eleven million, eight hundred one thousand, sixty-one".