20010122210 has 40 divisors (see below), whose sum is σ = 39020190156. Its totient is φ = 7388247360.

The previous prime is 20010122189. The next prime is 20010122261. The reversal of 20010122210 is 1222101002.

It is a happy number.

It can be written as a sum of positive squares in 10 ways, for example, as 13749673081 + 6260449129 = 117259^2 + 79123^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20010122191 and 20010122200.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 250580 + ... + 320640.

Almost surely, 2^20010122210 is an apocalyptic number.

20010122210 is a deficient number, since it is larger than the sum of its proper divisors (19010067946).

20010122210 is an frugal number, since it uses more digits than its factorization.

20010122210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70120 (or 70081 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20010122210 its reverse (1222101002), we get a palindrome (21232223212).

The spelling of 20010122210 in words is "twenty billion, ten million, one hundred twenty-two thousand, two hundred ten".