21011101122020 has 24 divisors (see below), whose sum is σ = 46041717242304. Its totient is φ = 8039029994336.

The previous prime is 21011101122007. The next prime is 21011101122047. The reversal of 21011101122020 is 2022110111012.

It is a junction number, because it is equal to n+sod(n) for n = 21011101121986 and 21011101122004.

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, 22838152934 + ... + 22838153853.

It is an arithmetic number, because the mean of its divisors is an integer number (1918404885096).

Almost surely, 2^{21011101122020} is an apocalyptic number.

21011101122020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21011101122020 is an abundant number, since it is smaller than the sum of its proper divisors (25030616120284).

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

21011101122020 is a wasteful number, since it uses less digits than its factorization.

21011101122020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45676306819 (or 45676306817 counting only the distinct ones).

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

Adding to 21011101122020 its reverse (2022110111012), we get a palindrome (23033211233032).

The spelling of 21011101122020 in words is "twenty-one trillion, eleven billion, one hundred one million, one hundred twenty-two thousand, twenty".