20111010001220 has 24 divisors (see below), whose sum is σ = 42469060233600. Its totient is φ = 7999463194592.

The previous prime is 20111010001189. The next prime is 20111010001241. The reversal of 20111010001220 is 2210001011102.

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, 2808796700 + ... + 2808803859.

It is an arithmetic number, because the mean of its divisors is an integer number (1769544176400).

Almost surely, 2^{20111010001220} is an apocalyptic number.

20111010001220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111010001220 is an abundant number, since it is smaller than the sum of its proper divisors (22358050232380).

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

20111010001220 is a wasteful number, since it uses less digits than its factorization.

20111010001220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5617600747 (or 5617600745 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20111010001220 its reverse (2210001011102), we get a palindrome (22321011012322).

The spelling of 20111010001220 in words is "twenty trillion, one hundred eleven billion, ten million, one thousand, two hundred twenty".