20111022201020 has 24 divisors (see below), whose sum is σ = 42233940886704. Its totient is φ = 8044257591936.

The previous prime is 20111022200999. The next prime is 20111022201073. The reversal of 20111022201020 is 2010222011102.

It is a junction number, because it is equal to n+sod(n) for n = 20111022200986 and 20111022201004.

It is a congruent number.

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, 8362409 + ... + 10495328.

It is an arithmetic number, because the mean of its divisors is an integer number (1759747536946).

Almost surely, 2^{20111022201020} is an apocalyptic number.

20111022201020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111022201020 is an abundant number, since it is smaller than the sum of its proper divisors (22122918685684).

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

20111022201020 is a wasteful number, since it uses less digits than its factorization.

20111022201020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18911069 (or 18911067 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20111022201020 its reverse (2010222011102), we get a palindrome (22121244212122).

The spelling of 20111022201020 in words is "twenty trillion, one hundred eleven billion, twenty-two million, two hundred one thousand, twenty".