20021012221985 has 64 divisors (see below), whose sum is σ = 25500524544000. Its totient is φ = 15066047969280.

The previous prime is 20021012221963. The next prime is 20021012222041. The reversal of 20021012221985 is 58912221012002.

It is a happy number.

It is not a de Polignac number, because 20021012221985 - 2⁶ = 20021012221921 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2993121521 + ... + 2993128209.

It is an arithmetic number, because the mean of its divisors is an integer number (398445696000).

Almost surely, 2^{20021012221985} is an apocalyptic number.

It is an amenable number.

20021012221985 is a deficient number, since it is larger than the sum of its proper divisors (5479512322015).

20021012221985 is a wasteful number, since it uses less digits than its factorization.

20021012221985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8886.

The product of its (nonzero) digits is 11520, while the sum is 35.

Adding to 20021012221985 its reverse (58912221012002), we get a palindrome (78933233233987).

The spelling of 20021012221985 in words is "twenty trillion, twenty-one billion, twelve million, two hundred twenty-one thousand, nine hundred eighty-five".