12120121231401 has 16 divisors (see below), whose sum is σ = 16554602369088. Its totient is φ = 7882867372800.

The previous prime is 12120121231391. The next prime is 12120121231403. The reversal of 12120121231401 is 10413212102121.

It is not a de Polignac number, because 12120121231401 - 2¹⁰ = 12120121230377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12120121231403) 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, 6423445 + ... + 8093261.

It is an arithmetic number, because the mean of its divisors is an integer number (1034662648068).

Almost surely, 2^{12120121231401} is an apocalyptic number.

It is an amenable number.

12120121231401 is a deficient number, since it is larger than the sum of its proper divisors (4434481137687).

12120121231401 is a wasteful number, since it uses less digits than its factorization.

12120121231401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1728872.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 12120121231401 its reverse (10413212102121), we get a palindrome (22533333333522).

The spelling of 12120121231401 in words is "twelve trillion, one hundred twenty billion, one hundred twenty-one million, two hundred thirty-one thousand, four hundred one".