133102421 has 2 divisors, whose sum is σ = 133102422. Its totient is φ = 133102420.

The previous prime is 133102399. The next prime is 133102447. The reversal of 133102421 is 124201331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105801796 + 27300625 = 10286^2 + 5225^2 .

It is an emirp because it is prime and its reverse (124201331) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133102421 is a prime.

It is a super-2 number, since 2×133102421² = 35432508952122482, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 133102421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133101421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66551210 + 66551211.

It is an arithmetic number, because the mean of its divisors is an integer number (66551211).

Almost surely, 2^133102421 is an apocalyptic number.

It is an amenable number.

133102421 is a deficient number, since it is larger than the sum of its proper divisors (1).

133102421 is an equidigital number, since it uses as much as digits as its factorization.

133102421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 133102421 is about 11537.0022536186. The cubic root of 133102421 is about 510.5778673499.

Adding to 133102421 its reverse (124201331), we get a palindrome (257303752).

The spelling of 133102421 in words is "one hundred thirty-three million, one hundred two thousand, four hundred twenty-one".