12121200401 has 2 divisors, whose sum is σ = 12121200402. Its totient is φ = 12121200400.

The previous prime is 12121200391. The next prime is 12121200409. The reversal of 12121200401 is 10400212121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12047257600 + 73942801 = 109760^2 + 8599^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12121200401 is a prime.

It is a super-2 number, since 2×12121200401² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12121200409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060600200 + 6060600201.

It is an arithmetic number, because the mean of its divisors is an integer number (6060600201).

Almost surely, 2^12121200401 is an apocalyptic number.

It is an amenable number.

12121200401 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121200401 is an equidigital number, since it uses as much as digits as its factorization.

12121200401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12121200401 its reverse (10400212121), we get a palindrome (22521412522).

The spelling of 12121200401 in words is "twelve billion, one hundred twenty-one million, two hundred thousand, four hundred one".