12021356354 has 32 divisors (see below), whose sum is σ = 21719301120. Its totient is φ = 4874860368.

The previous prime is 12021356339. The next prime is 12021356381. The reversal of 12021356354 is 45365312021.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12021356354.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192659 + ... + 247305.

It is an arithmetic number, because the mean of its divisors is an integer number (678728160).

Almost surely, 2^12021356354 is an apocalyptic number.

12021356354 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12021356354 is a deficient number, since it is larger than the sum of its proper divisors (9697944766).

12021356354 is a wasteful number, since it uses less digits than its factorization.

12021356354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55502.

The product of its (nonzero) digits is 21600, while the sum is 32.

Adding to 12021356354 its reverse (45365312021), we get a palindrome (57386668375).

The spelling of 12021356354 in words is "twelve billion, twenty-one million, three hundred fifty-six thousand, three hundred fifty-four".