33100421 has 2 divisors, whose sum is σ = 33100422. Its totient is φ = 33100420.

The previous prime is 33100351. The next prime is 33100423. The reversal of 33100421 is 12400133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31248100 + 1852321 = 5590^2 + 1361^2 .

It is a cyclic number.

It is not a de Polignac number, because 33100421 - 2²² = 28906117 is a prime.

Together with 33100423, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 33100396 and 33100405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33100423) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16550210 + 16550211.

It is an arithmetic number, because the mean of its divisors is an integer number (16550211).

Almost surely, 2^33100421 is an apocalyptic number.

It is an amenable number.

33100421 is a deficient number, since it is larger than the sum of its proper divisors (1).

33100421 is an equidigital number, since it uses as much as digits as its factorization.

33100421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 33100421 is about 5753.2965332929. The cubic root of 33100421 is about 321.0784609077.

Adding to 33100421 its reverse (12400133), we get a palindrome (45500554).

The spelling of 33100421 in words is "thirty-three million, one hundred thousand, four hundred twenty-one".