20102102210 has 64 divisors (see below), whose sum is σ = 38028718080. Its totient is φ = 7641354240.

The previous prime is 20102102063. The next prime is 20102102219. The reversal of 20102102210 is 1220120102.

It is a happy number.

It is a super-2 number, since 2×20102102210² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20102102191 and 20102102200.

It is not an unprimeable number, because it can be changed into a prime (20102102219) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4724444 + ... + 4728696.

It is an arithmetic number, because the mean of its divisors is an integer number (594198720).

Almost surely, 2^20102102210 is an apocalyptic number.

20102102210 is a deficient number, since it is larger than the sum of its proper divisors (17926615870).

20102102210 is a wasteful number, since it uses less digits than its factorization.

20102102210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4563.

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

Adding to 20102102210 its reverse (1220120102), we get a palindrome (21322222312).

The spelling of 20102102210 in words is "twenty billion, one hundred two million, one hundred two thousand, two hundred ten".