20311330202122 has 4 divisors (see below), whose sum is σ = 30466995303186. Its totient is φ = 10155665101060.

The previous prime is 20311330202089. The next prime is 20311330202123. The reversal of 20311330202122 is 22120203311302.

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

It can be written as a sum of positive squares in only one way, i.e., 12983259226441 + 7328070975681 = 3603229^2 + 2707041^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20311330202093 and 20311330202102.

It is not an unprimeable number, because it can be changed into a prime (20311330202123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5077832550529 + ... + 5077832550532.

Almost surely, 2^{20311330202122} is an apocalyptic number.

20311330202122 is a deficient number, since it is larger than the sum of its proper divisors (10155665101064).

20311330202122 is a wasteful number, since it uses less digits than its factorization.

20311330202122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10155665101063.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 20311330202122 its reverse (22120203311302), we get a palindrome (42431533513424).

The spelling of 20311330202122 in words is "twenty trillion, three hundred eleven billion, three hundred thirty million, two hundred two thousand, one hundred twenty-two".