20021220102010 has 32 divisors (see below), whose sum is σ = 38171262603600. Its totient is φ = 7534798528512.

The previous prime is 20021220101989. The next prime is 20021220102041. The reversal of 20021220102010 is 1020102212002.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 12308330272329 + 7712889829681 = 3508323^2 + 2777209^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19834035 + ... + 20819014.

Almost surely, 2^{20021220102010} is an apocalyptic number.

20021220102010 is a deficient number, since it is larger than the sum of its proper divisors (18150042501590).

20021220102010 is a wasteful number, since it uses less digits than its factorization.

20021220102010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40655970.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20021220102010 its reverse (1020102212002), we get a palindrome (21041322314012).

The spelling of 20021220102010 in words is "twenty trillion, twenty-one billion, two hundred twenty million, one hundred two thousand, ten".