20021101102210 has 32 divisors (see below), whose sum is σ = 39542401145520. Its totient is φ = 7252927189248.

The previous prime is 20021101102207. The next prime is 20021101102217. The reversal of 20021101102210 is 1220110112002.

It can be written as a sum of positive squares in 8 ways, for example, as 4169849764441 + 15851251337769 = 2042021^2 + 3981363^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (20021101102217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1452903205 + ... + 1452916984.

Almost surely, 2^{20021101102210} is an apocalyptic number.

20021101102210 is a deficient number, since it is larger than the sum of its proper divisors (19521300043310).

20021101102210 is a wasteful number, since it uses less digits than its factorization.

20021101102210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2905820262.

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

Adding to 20021101102210 its reverse (1220110112002), we get a palindrome (21241211214212).

The spelling of 20021101102210 in words is "twenty trillion, twenty-one billion, one hundred one million, one hundred two thousand, two hundred ten".