12420101 has 4 divisors (see below), whose sum is σ = 12595104. Its totient is φ = 12245100.

The previous prime is 12420097. The next prime is 12420131. The reversal of 12420101 is 10102421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10102421 = 7 ⋅1443203.

It is a cyclic number.

It is not a de Polignac number, because 12420101 - 2² = 12420097 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 (12420131) 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, 87395 + ... + 87536.

It is an arithmetic number, because the mean of its divisors is an integer number (3148776).

Almost surely, 2^12420101 is an apocalyptic number.

It is an amenable number.

12420101 is a deficient number, since it is larger than the sum of its proper divisors (175003).

12420101 is an equidigital number, since it uses as much as digits as its factorization.

12420101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175002.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 12420101 is about 3524.2163667970. The cubic root of 12420101 is about 231.5839066277.

Adding to 12420101 its reverse (10102421), we get a palindrome (22522522).

It can be divided in two parts, 12420 and 101, that added together give a palindrome (12521).

The spelling of 12420101 in words is "twelve million, four hundred twenty thousand, one hundred one".