20111222011020 has 96 divisors (see below), whose sum is σ = 65725185189888. Its totient is φ = 4499045405952.

The previous prime is 20111222010917. The next prime is 20111222011039. The reversal of 20111222011020 is 2011022211102.

It is a super-2 number, since 2×20111222011020² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 509383047 + ... + 509422526.

It is an arithmetic number, because the mean of its divisors is an integer number (684637345728).

Almost surely, 2^{20111222011020} is an apocalyptic number.

20111222011020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111222011020 is an abundant number, since it is smaller than the sum of its proper divisors (45613963178868).

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

20111222011020 is a wasteful number, since it uses less digits than its factorization.

20111222011020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018805639 (or 1018805637 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20111222011020 its reverse (2011022211102), we get a palindrome (22122244222122).

The spelling of 20111222011020 in words is "twenty trillion, one hundred eleven billion, two hundred twenty-two million, eleven thousand, twenty".