2021011512 has 64 divisors (see below), whose sum is σ = 5473524000. Its totient is φ = 621833472.

The previous prime is 2021011511. The next prime is 2021011543. The reversal of 2021011512 is 2151101202.

It is a super-2 number, since 2×2021011512² = 8168975063273052288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2021011491 and 2021011500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021011511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33564 + ... + 71892.

Almost surely, 2^2021011512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2021011512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2736762000).

2021011512 is an abundant number, since it is smaller than the sum of its proper divisors (3452512488).

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

2021011512 is a wasteful number, since it uses less digits than its factorization.

2021011512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38377 (or 38347 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 2021011512 is about 44955.6616234263. The cubic root of 2021011512 is about 1264.3178295322.

Adding to 2021011512 its reverse (2151101202), we get a palindrome (4172112714).

The spelling of 2021011512 in words is "two billion, twenty-one million, eleven thousand, five hundred twelve".