133023001663261 has 4 divisors (see below), whose sum is σ = 133450728357024. Its totient is φ = 132595274969500.

The previous prime is 133023001663249. The next prime is 133023001663399. The reversal of 133023001663261 is 162366100320331.

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.

It is a cyclic number.

It is not a de Polignac number, because 133023001663261 - 2¹¹ = 133023001661213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133023001663261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133023001663661) 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, 213863346415 + ... + 213863347036.

It is an arithmetic number, because the mean of its divisors is an integer number (33362682089256).

Almost surely, 2^{133023001663261} is an apocalyptic number.

It is an amenable number.

133023001663261 is a deficient number, since it is larger than the sum of its proper divisors (427726693763).

133023001663261 is an equidigital number, since it uses as much as digits as its factorization.

133023001663261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427726693762.

The product of its (nonzero) digits is 69984, while the sum is 37.

Adding to 133023001663261 its reverse (162366100320331), we get a palindrome (295389101983592).

The spelling of 133023001663261 in words is "one hundred thirty-three trillion, twenty-three billion, one million, six hundred sixty-three thousand, two hundred sixty-one".