12400401211 has 4 divisors (see below), whose sum is σ = 13527710424. Its totient is φ = 11273092000.

The previous prime is 12400401197. The next prime is 12400401229. The reversal of 12400401211 is 11210400421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11210400421 = 11 ⋅1019127311.

It is a cyclic number.

It is not a de Polignac number, because 12400401211 - 2⁹ = 12400400699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12400401271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 563654590 + ... + 563654611.

It is an arithmetic number, because the mean of its divisors is an integer number (3381927606).

Almost surely, 2^12400401211 is an apocalyptic number.

12400401211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12400401211 is a deficient number, since it is larger than the sum of its proper divisors (1127309213).

12400401211 is a wasteful number, since it uses less digits than its factorization.

12400401211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127309212.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12400401211 its reverse (11210400421), we get a palindrome (23610801632).

The spelling of 12400401211 in words is "twelve billion, four hundred million, four hundred one thousand, two hundred eleven".