12021340461 has 16 divisors (see below), whose sum is σ = 17278781184. Its totient is φ = 7390304064.

The previous prime is 12021340453. The next prime is 12021340511. The reversal of 12021340461 is 16404312021.

It is not a de Polignac number, because 12021340461 - 2³ = 12021340453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021340421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115701 + ... + 193466.

It is an arithmetic number, because the mean of its divisors is an integer number (1079923824).

Almost surely, 2^12021340461 is an apocalyptic number.

It is an amenable number.

12021340461 is a deficient number, since it is larger than the sum of its proper divisors (5257440723).

12021340461 is a wasteful number, since it uses less digits than its factorization.

12021340461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310180.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 12021340461 its reverse (16404312021), we get a palindrome (28425652482).

The spelling of 12021340461 in words is "twelve billion, twenty-one million, three hundred forty thousand, four hundred sixty-one".