13212101 has 4 divisors (see below), whose sum is σ = 15099552. Its totient is φ = 11324652.

The previous prime is 13212061. The next prime is 13212103. The reversal of 13212101 is 10121231.

13212101 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

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: 10121231 = 73 ⋅138647.

It is a cyclic number.

It is not a de Polignac number, because 13212101 - 2²² = 9017797 is a prime.

It is a super-2 number, since 2×13212101² = 349119225668402, which contains 22 as substring.

It is a Duffinian number.

13212101 is strictly pandigital in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13212103) 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, 943715 + ... + 943728.

It is an arithmetic number, because the mean of its divisors is an integer number (3774888).

Almost surely, 2^13212101 is an apocalyptic number.

It is an amenable number.

13212101 is a deficient number, since it is larger than the sum of its proper divisors (1887451).

13212101 is an equidigital number, since it uses as much as digits as its factorization.

13212101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1887450.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 13212101 is about 3634.8453887339. The cubic root of 13212101 is about 236.4053469110.

Adding to 13212101 its reverse (10121231), we get a palindrome (23333332).

The spelling of 13212101 in words is "thirteen million, two hundred twelve thousand, one hundred one".