20012021355116 has 36 divisors (see below), whose sum is σ = 40740115726800. Its totient is φ = 8576294692896.

The previous prime is 20012021355043. The next prime is 20012021355149. The reversal of 20012021355116 is 61155312021002.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4246145 + ... + 7619303.

It is an arithmetic number, because the mean of its divisors is an integer number (1131669881300).

Almost surely, 2^{20012021355116} is an apocalyptic number.

It is an amenable number.

20012021355116 is an abundant number, since it is smaller than the sum of its proper divisors (20728094371684).

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

20012021355116 is a wasteful number, since it uses less digits than its factorization.

20012021355116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3403446 (or 3403437 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 29.

Adding to 20012021355116 its reverse (61155312021002), we get a palindrome (81167333376118).

The spelling of 20012021355116 in words is "twenty trillion, twelve billion, twenty-one million, three hundred fifty-five thousand, one hundred sixteen".