210020133311 has 4 divisors (see below), whose sum is σ = 210151644072. Its totient is φ = 209888622552.

The previous prime is 210020133287. The next prime is 210020133319. The reversal of 210020133311 is 113331020012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210020133311 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 210020133311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210020133319) 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, 65752985 + ... + 65756178.

It is an arithmetic number, because the mean of its divisors is an integer number (52537911018).

Almost surely, 2^210020133311 is an apocalyptic number.

210020133311 is a deficient number, since it is larger than the sum of its proper divisors (131510761).

210020133311 is a wasteful number, since it uses less digits than its factorization.

210020133311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131510760.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 210020133311 its reverse (113331020012), we get a palindrome (323351153323).

The spelling of 210020133311 in words is "two hundred ten billion, twenty million, one hundred thirty-three thousand, three hundred eleven".