20111210210 has 64 divisors (see below), whose sum is σ = 44811954432. Its totient is φ = 6328025856.

The previous prime is 20111210131. The next prime is 20111210233. The reversal of 20111210210 is 1201211102.

It is a super-2 number, since 2×20111210210² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20111210191 and 20111210200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 93557 + ... + 221303.

It is an arithmetic number, because the mean of its divisors is an integer number (700186788).

Almost surely, 2^20111210210 is an apocalyptic number.

20111210210 is an abundant number, since it is smaller than the sum of its proper divisors (24700744222).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20111210210 is a wasteful number, since it uses less digits than its factorization.

20111210210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127947.

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

Adding to 20111210210 its reverse (1201211102), we get a palindrome (21312421312).

The spelling of 20111210210 in words is "twenty billion, one hundred eleven million, two hundred ten thousand, two hundred ten".