12020560531 has 4 divisors (see below), whose sum is σ = 13737783472. Its totient is φ = 10303337592.

The previous prime is 12020560507. The next prime is 12020560561. The reversal of 12020560531 is 13506502021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13506502021 = 29 ⋅465741449.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12020560531 is a prime.

It is a super-2 number, since 2×12020560531² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12020560496 and 12020560505.

It is not an unprimeable number, because it can be changed into a prime (12020560561) 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, 858611460 + ... + 858611473.

It is an arithmetic number, because the mean of its divisors is an integer number (3434445868).

Almost surely, 2^12020560531 is an apocalyptic number.

12020560531 is a deficient number, since it is larger than the sum of its proper divisors (1717222941).

12020560531 is an equidigital number, since it uses as much as digits as its factorization.

12020560531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1717222940.

The product of its (nonzero) digits is 1800, while the sum is 25.

The spelling of 12020560531 in words is "twelve billion, twenty million, five hundred sixty thousand, five hundred thirty-one".