20102111210 has 16 divisors (see below), whose sum is σ = 38312259336. Its totient is φ = 7567853568.

The previous prime is 20102111189. The next prime is 20102111257. The reversal of 20102111210 is 1211120102.

It can be written as a sum of positive squares in 4 ways, for example, as 19949020081 + 153091129 = 141241^2 + 12373^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20102111191 and 20102111200.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59123687 + ... + 59124026.

Almost surely, 2^20102111210 is an apocalyptic number.

20102111210 is a deficient number, since it is larger than the sum of its proper divisors (18210148126).

20102111210 is a wasteful number, since it uses less digits than its factorization.

20102111210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118247737.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20102111210 its reverse (1211120102), we get a palindrome (21313231312).

The spelling of 20102111210 in words is "twenty billion, one hundred two million, one hundred eleven thousand, two hundred ten".