20211111020020 has 48 divisors (see below), whose sum is σ = 42574010310720. Its totient is φ = 8059589531136.

The previous prime is 20211111019969. The next prime is 20211111020041. The reversal of 20211111020020 is 2002011111202.

It is a congruent number.

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, 7860444 + ... + 10109836.

It is an arithmetic number, because the mean of its divisors is an integer number (886958548140).

Almost surely, 2^{20211111020020} is an apocalyptic number.

20211111020020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20211111020020 is an abundant number, since it is smaller than the sum of its proper divisors (22362899290700).

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

20211111020020 is a wasteful number, since it uses less digits than its factorization.

20211111020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2250784 (or 2250782 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20211111020020 its reverse (2002011111202), we get a palindrome (22213122131222).

The spelling of 20211111020020 in words is "twenty trillion, two hundred eleven billion, one hundred eleven million, twenty thousand, twenty".