20012120210 has 8 divisors (see below), whose sum is σ = 36021816396. Its totient is φ = 8004848080.

The previous prime is 20012120207. The next prime is 20012120243. The reversal of 20012120210 is 1202121002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19423718161 + 588402049 = 139369^2 + 24257^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 20012120191 and 20012120200.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1000606001 + ... + 1000606020.

Almost surely, 2^20012120210 is an apocalyptic number.

20012120210 is a deficient number, since it is larger than the sum of its proper divisors (16009696186).

20012120210 is a wasteful number, since it uses less digits than its factorization.

20012120210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2001212028.

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

Adding to 20012120210 its reverse (1202121002), we get a palindrome (21214241212).

The spelling of 20012120210 in words is "twenty billion, twelve million, one hundred twenty thousand, two hundred ten".