20311023322021 has 4 divisors (see below), whose sum is σ = 20313073500832. Its totient is φ = 20308973143212.

The previous prime is 20311023322013. The next prime is 20311023322127. The reversal of 20311023322021 is 12022332011302.

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 20311023322021 - 2³ = 20311023322013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20311023321983 and 20311023322001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311023322721) 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, 1025074545 + ... + 1025094358.

It is an arithmetic number, because the mean of its divisors is an integer number (5078268375208).

Almost surely, 2^{20311023322021} is an apocalyptic number.

It is an amenable number.

20311023322021 is a deficient number, since it is larger than the sum of its proper divisors (2050178811).

20311023322021 is an equidigital number, since it uses as much as digits as its factorization.

20311023322021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2050178810.

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

Adding to 20311023322021 its reverse (12022332011302), we get a palindrome (32333355333323).

The spelling of 20311023322021 in words is "twenty trillion, three hundred eleven billion, twenty-three million, three hundred twenty-two thousand, twenty-one".