20111021120210 has 128 divisors (see below), whose sum is σ = 36897279909120. Its totient is φ = 7891669057536.

The previous prime is 20111021120167. The next prime is 20111021120221. The reversal of 20111021120210 is 1202112011102.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 35344500806 + ... + 35344501374.

It is an arithmetic number, because the mean of its divisors is an integer number (288259999290).

Almost surely, 2^{20111021120210} is an apocalyptic number.

20111021120210 is a deficient number, since it is larger than the sum of its proper divisors (16786258788910).

20111021120210 is a wasteful number, since it uses less digits than its factorization.

20111021120210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1612.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20111021120210 its reverse (1202112011102), we get a palindrome (21313133131312).

The spelling of 20111021120210 in words is "twenty trillion, one hundred eleven billion, twenty-one million, one hundred twenty thousand, two hundred ten".