20012112320321 has 4 divisors (see below), whose sum is σ = 21831395258544. Its totient is φ = 18192829382100.

The previous prime is 20012112320297. The next prime is 20012112320341. The reversal of 20012112320321 is 12302321121002.

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-20012112320321 is a prime.

It is a super-2 number, since 2×20012112320321² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20012112320293 and 20012112320302.

It is not an unprimeable number, because it can be changed into a prime (20012112320341) 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, 909641469095 + ... + 909641469116.

It is an arithmetic number, because the mean of its divisors is an integer number (5457848814636).

Almost surely, 2^{20012112320321} is an apocalyptic number.

It is an amenable number.

20012112320321 is a deficient number, since it is larger than the sum of its proper divisors (1819282938223).

20012112320321 is a wasteful number, since it uses less digits than its factorization.

20012112320321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1819282938222.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 20012112320321 its reverse (12302321121002), we get a palindrome (32314433441323).

The spelling of 20012112320321 in words is "twenty trillion, twelve billion, one hundred twelve million, three hundred twenty thousand, three hundred twenty-one".