20211101020 has 48 divisors (see below), whose sum is σ = 46509539328. Its totient is φ = 7316516160.

The previous prime is 20211101017. The next prime is 20211101023. The reversal of 20211101020 is 2010111202.

It is an interprime number because it is at equal distance from previous prime (20211101017) and next prime (20211101023).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 20211100988 and 20211101006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211101023) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 156924 + ... + 255043.

It is an arithmetic number, because the mean of its divisors is an integer number (968948736).

Almost surely, 2^20211101020 is an apocalyptic number.

20211101020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20211101020 is an abundant number, since it is smaller than the sum of its proper divisors (26298438308).

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

20211101020 is a wasteful number, since it uses less digits than its factorization.

20211101020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412210 (or 412208 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20211101020 its reverse (2010111202), we get a palindrome (22221212222).

The spelling of 20211101020 in words is "twenty billion, two hundred eleven million, one hundred one thousand, twenty".