12421101 has 32 divisors (see below), whose sum is σ = 21869568. Its totient is φ = 6071040.

The previous prime is 12421099. The next prime is 12421103. The reversal of 12421101 is 10112421.

12421101 = 204² + 205² + ... + 357².

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12421099) and next prime (12421103).

It is not a de Polignac number, because 12421101 - 2¹ = 12421099 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12421103) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2346 + ... + 5508.

It is an arithmetic number, because the mean of its divisors is an integer number (683424).

Almost surely, 2^12421101 is an apocalyptic number.

12421101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12421101 is a deficient number, since it is larger than the sum of its proper divisors (9448467).

12421101 is a wasteful number, since it uses less digits than its factorization.

12421101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3201.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 12421101 is about 3524.3582394530. The cubic root of 12421101 is about 231.5901217594.

Adding to 12421101 its reverse (10112421), we get a palindrome (22533522).

It can be divided in two parts, 12421 and 101, that multiplied together give a palindrome (1254521).

The spelling of 12421101 in words is "twelve million, four hundred twenty-one thousand, one hundred one".