2021011210020 has 192 divisors, whose sum is σ = 6339472957440. Its totient is φ = 476926195200.

The previous prime is 2021011210003. The next prime is 2021011210109. The reversal of 2021011210020 is 200121101202.

It is a super-2 number, since 2×2021011210020² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 2021011209978 and 2021011210005.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3428974 + ... + 3974906.

It is an arithmetic number, because the mean of its divisors is an integer number (33018088320).

Almost surely, 2^{2021011210020} is an apocalyptic number.

2021011210020 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 2021011210020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3169736478720).

2021011210020 is an abundant number, since it is smaller than the sum of its proper divisors (4318461747420).

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

2021011210020 is a wasteful number, since it uses less digits than its factorization.

2021011210020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546106 (or 546104 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 2021011210020 its reverse (200121101202), we get a palindrome (2221132311222).

The spelling of 2021011210020 in words is "two trillion, twenty-one billion, eleven million, two hundred ten thousand, twenty".