20011011222220 has 48 divisors (see below), whose sum is σ = 42086790164160. Its totient is φ = 7992284961024.

The previous prime is 20011011222203. The next prime is 20011011222253. The reversal of 20011011222220 is 2222211011002.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20011011222194 and 20011011222203.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43090702 + ... + 43552618.

It is an arithmetic number, because the mean of its divisors is an integer number (876808128420).

Almost surely, 2^{20011011222220} is an apocalyptic number.

20011011222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011011222220 is an abundant number, since it is smaller than the sum of its proper divisors (22075778941940).

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

20011011222220 is a wasteful number, since it uses less digits than its factorization.

20011011222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465202 (or 465200 counting only the distinct ones).

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

Adding to 20011011222220 its reverse (2222211011002), we get a palindrome (22233222233222).

The spelling of 20011011222220 in words is "twenty trillion, eleven billion, eleven million, two hundred twenty-two thousand, two hundred twenty".