20011221229996 has 96 divisors (see below), whose sum is σ = 38072820344832. Its totient is φ = 9167068416000.

The previous prime is 20011221229963. The next prime is 20011221229997. The reversal of 20011221229996 is 69992212211002.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20011221229997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 583179336 + ... + 583213648.

It is an arithmetic number, because the mean of its divisors is an integer number (396591878592).

Almost surely, 2^{20011221229996} is an apocalyptic number.

It is an amenable number.

20011221229996 is a deficient number, since it is larger than the sum of its proper divisors (18061599114836).

20011221229996 is a wasteful number, since it uses less digits than its factorization.

20011221229996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35359 (or 35357 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 46.

The spelling of 20011221229996 in words is "twenty trillion, eleven billion, two hundred twenty-one million, two hundred twenty-nine thousand, nine hundred ninety-six".