2021311011020 has 96 divisors (see below), whose sum is σ = 4926896658432. Its totient is φ = 682213517568.

The previous prime is 2021311010989. The next prime is 2021311011029. The reversal of 2021311011020 is 201101131202.

It is a super-2 number, since 2×2021311011020² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 2021311010986 and 2021311011004.

It is not an unprimeable number, because it can be changed into a prime (2021311011029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13875602 + ... + 14020518.

It is an arithmetic number, because the mean of its divisors is an integer number (51321840192).

Almost surely, 2^{2021311011020} is an apocalyptic number.

2021311011020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2021311011020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2463448329216).

2021311011020 is an abundant number, since it is smaller than the sum of its proper divisors (2905585647412).

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

2021311011020 is a wasteful number, since it uses less digits than its factorization.

2021311011020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146487 (or 146485 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 2021311011020 its reverse (201101131202), we get a palindrome (2222412142222).

The spelling of 2021311011020 in words is "two trillion, twenty-one billion, three hundred eleven million, eleven thousand, twenty".