20110122201220 has 24 divisors (see below), whose sum is σ = 42332047228800. Its totient is φ = 8024850669792.

The previous prime is 20110122201181. The next prime is 20110122201241. The reversal of 20110122201220 is 2210222101102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20110122201194 and 20110122201203.

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, 1199879580 + ... + 1199896339.

It is an arithmetic number, because the mean of its divisors is an integer number (1763835301200).

Almost surely, 2^{20110122201220} is an apocalyptic number.

20110122201220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20110122201220 is an abundant number, since it is smaller than the sum of its proper divisors (22221925027580).

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

20110122201220 is a wasteful number, since it uses less digits than its factorization.

20110122201220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2399776347 (or 2399776345 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20110122201220 its reverse (2210222101102), we get a palindrome (22320344302322).

The spelling of 20110122201220 in words is "twenty trillion, one hundred ten billion, one hundred twenty-two million, two hundred one thousand, two hundred twenty".