20122321013 has 4 divisors (see below), whose sum is σ = 21181390560. Its totient is φ = 19063251468.

The previous prime is 20122320991. The next prime is 20122321019. The reversal of 20122321013 is 31012322102.

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 a de Polignac number, because none of the positive numbers 2^k-20122321013 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20122320982 and 20122321000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122321019) 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, 529534745 + ... + 529534782.

It is an arithmetic number, because the mean of its divisors is an integer number (5295347640).

Almost surely, 2^20122321013 is an apocalyptic number.

It is an amenable number.

20122321013 is a deficient number, since it is larger than the sum of its proper divisors (1059069547).

20122321013 is a wasteful number, since it uses less digits than its factorization.

20122321013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059069546.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20122321013 its reverse (31012322102), we get a palindrome (51134643115).

The spelling of 20122321013 in words is "twenty billion, one hundred twenty-two million, three hundred twenty-one thousand, thirteen".