20101001221010 has 16 divisors (see below), whose sum is σ = 38310143503896. Its totient is φ = 7567435753728.

The previous prime is 20101001221001. The next prime is 20101001221033. The reversal of 20101001221010 is 1012210010102.

It can be written as a sum of positive squares in 4 ways, for example, as 18280900730689 + 1820100490321 = 4275617^2 + 1349111^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20101001220982 and 20101001221000.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59120591657 + ... + 59120591996.

Almost surely, 2^{20101001221010} is an apocalyptic number.

20101001221010 is a deficient number, since it is larger than the sum of its proper divisors (18209142282886).

20101001221010 is a wasteful number, since it uses less digits than its factorization.

20101001221010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118241183677.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20101001221010 its reverse (1012210010102), we get a palindrome (21113211231112).

The spelling of 20101001221010 in words is "twenty trillion, one hundred one billion, one million, two hundred twenty-one thousand, ten".