12021041400 has 96 divisors (see below), whose sum is σ = 37775848560. Its totient is φ = 3161687040.

The previous prime is 12021041381. The next prime is 12021041413. The reversal of 12021041400 is 414012021.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 12021041400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93427 + ... + 181026.

Almost surely, 2^12021041400 is an apocalyptic number.

12021041400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021041400 is an abundant number, since it is smaller than the sum of its proper divisors (25754807160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12021041400 is a wasteful number, since it uses less digits than its factorization.

12021041400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274545 (or 274536 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 12021041400 its reverse (414012021), we get a palindrome (12435053421).

The spelling of 12021041400 in words is "twelve billion, twenty-one million, forty-one thousand, four hundred".