320020123212133 has 4 divisors (see below), whose sum is σ = 320020343108908. Its totient is φ = 320019903315360.

The previous prime is 320020123212113. The next prime is 320020123212247. The reversal of 320020123212133 is 331212321020023.

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

It can be written as a sum of positive squares in 2 ways, for example, as 177370136169444 + 142649987042689 = 13318038^2 + 11943617^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320020123212133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320020123212098 and 320020123212107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320020123212113) 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, 107750766 + ... + 110680927.

It is an arithmetic number, because the mean of its divisors is an integer number (80005085777227).

Almost surely, 2^{320020123212133} is an apocalyptic number.

It is an amenable number.

320020123212133 is a deficient number, since it is larger than the sum of its proper divisors (219896775).

320020123212133 is a wasteful number, since it uses less digits than its factorization.

320020123212133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219896774.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 320020123212133 its reverse (331212321020023), we get a palindrome (651232444232156).

The spelling of 320020123212133 in words is "three hundred twenty trillion, twenty billion, one hundred twenty-three million, two hundred twelve thousand, one hundred thirty-three".