20111020221010 has 16 divisors (see below), whose sum is σ = 36315490832856. Its totient is φ = 8018707102848.

The previous prime is 20111020220999. The next prime is 20111020221049. The reversal of 20111020221010 is 1012202011102.

It can be written as a sum of positive squares in 4 ways, for example, as 3554397566721 + 16556622654289 = 1885311^2 + 4068983^2 .

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, 3212619909 + ... + 3212626168.

Almost surely, 2^{20111020221010} is an apocalyptic number.

20111020221010 is a deficient number, since it is larger than the sum of its proper divisors (16204470611846).

20111020221010 is a wasteful number, since it uses less digits than its factorization.

20111020221010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6425246397.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20111020221010 its reverse (1012202011102), we get a palindrome (21123222232112).

The spelling of 20111020221010 in words is "twenty trillion, one hundred eleven billion, twenty million, two hundred twenty-one thousand, ten".