2102120210 has 16 divisors (see below), whose sum is σ = 4006394136. Its totient is φ = 791386368.

The previous prime is 2102120201. The next prime is 2102120221. The reversal of 2102120210 is 120212012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2015201881 + 86918329 = 44891^2 + 9323^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2102120191 and 2102120200.

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, 6182537 + ... + 6182876.

Almost surely, 2^2102120210 is an apocalyptic number.

2102120210 is a deficient number, since it is larger than the sum of its proper divisors (1904273926).

2102120210 is a wasteful number, since it uses less digits than its factorization.

2102120210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12365437.

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

The square root of 2102120210 is about 45848.8845011523. The cubic root of 2102120210 is about 1281.0099877687.

Adding to 2102120210 its reverse (120212012), we get a palindrome (2222332222).

The spelling of 2102120210 in words is "two billion, one hundred two million, one hundred twenty thousand, two hundred ten".