20021011101010 has 16 divisors (see below), whose sum is σ = 36178044966936. Its totient is φ = 7977243332608.

The previous prime is 20021011100971. The next prime is 20021011101017. The reversal of 20021011101010 is 1010111012002.

20021011101010 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 17814232517481 + 2206778583529 = 4220691^2 + 1485523^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (20021011101017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3895135777 + ... + 3895140916.

Almost surely, 2^{20021011101010} is an apocalyptic number.

20021011101010 is a deficient number, since it is larger than the sum of its proper divisors (16157033865926).

20021011101010 is a wasteful number, since it uses less digits than its factorization.

20021011101010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7790276957.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 20021011101010 its reverse (1010111012002), we get a palindrome (21031122113012).

The spelling of 20021011101010 in words is "twenty trillion, twenty-one billion, eleven million, one hundred one thousand, ten".