12021052455 has 20 divisors (see below), whose sum is σ = 21548850312. Its totient is φ = 6411227760.

The previous prime is 12021052453. The next prime is 12021052457. The reversal of 12021052455 is 55425012021.

12021052455 is a `hidden beast` number, since 1 + 202 + 1 + 0 + 5 + 2 + 455 = 666.

It is an interprime number because it is at equal distance from previous prime (12021052453) and next prime (12021052457).

It is not a de Polignac number, because 12021052455 - 2¹ = 12021052453 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021052453) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 14840401 + ... + 14841210.

Almost surely, 2^12021052455 is an apocalyptic number.

12021052455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12021052455 is a deficient number, since it is larger than the sum of its proper divisors (9527797857).

12021052455 is an equidigital number, since it uses as much as digits as its factorization.

12021052455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29681628 (or 29681619 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

Adding to 12021052455 its reverse (55425012021), we get a palindrome (67446064476).

The spelling of 12021052455 in words is "twelve billion, twenty-one million, fifty-two thousand, four hundred fifty-five".