12021356460 has 48 divisors (see below), whose sum is σ = 34065351936. Its totient is φ = 3167070912.

The previous prime is 12021356443. The next prime is 12021356467. The reversal of 12021356460 is 6465312021.

It is a super-2 number, since 2×12021356460² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (12021356467) 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, 1201984 + ... + 1211943.

It is an arithmetic number, because the mean of its divisors is an integer number (709694832).

Almost surely, 2^12021356460 is an apocalyptic number.

12021356460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021356460 is an abundant number, since it is smaller than the sum of its proper divisors (22043995476).

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

12021356460 is a wasteful number, since it uses less digits than its factorization.

12021356460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2414022 (or 2414020 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

Adding to 12021356460 its reverse (6465312021), we get a palindrome (18486668481).

The spelling of 12021356460 in words is "twelve billion, twenty-one million, three hundred fifty-six thousand, four hundred sixty".