20111011210220 has 48 divisors (see below), whose sum is σ = 49930786463040. Its totient is φ = 6657438192384.

The previous prime is 20111011210217. The next prime is 20111011210261. The reversal of 20111011210220 is 2201211011102.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 20111011210195 and 20111011210204.

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, 2476721459 + ... + 2476729578.

It is an arithmetic number, because the mean of its divisors is an integer number (1040224717980).

Almost surely, 2^{20111011210220} is an apocalyptic number.

20111011210220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111011210220 is an abundant number, since it is smaller than the sum of its proper divisors (29819775252820).

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

20111011210220 is a wasteful number, since it uses less digits than its factorization.

20111011210220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4953451082 (or 4953451080 counting only the distinct ones).

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

Adding to 20111011210220 its reverse (2201211011102), we get a palindrome (22312222221322).

The spelling of 20111011210220 in words is "twenty trillion, one hundred eleven billion, eleven million, two hundred ten thousand, two hundred twenty".