20010111021210 has 32 divisors (see below), whose sum is σ = 48024611236800. Its totient is φ = 5335991296128.

The previous prime is 20010111021209. The next prime is 20010111021289. The reversal of 20010111021210 is 1212011101002.

It is a super-2 number, since 2×20010111021210² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1985241 + ... + 6630339.

It is an arithmetic number, because the mean of its divisors is an integer number (1500769101150).

Almost surely, 2^{20010111021210} is an apocalyptic number.

20010111021210 is an abundant number, since it is smaller than the sum of its proper divisors (28014500215590).

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

20010111021210 is a wasteful number, since it uses less digits than its factorization.

20010111021210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4788702.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20010111021210 its reverse (1212011101002), we get a palindrome (21222122122212).

The spelling of 20010111021210 in words is "twenty trillion, ten billion, one hundred eleven million, twenty-one thousand, two hundred ten".