2021012112 has 80 divisors (see below), whose sum is σ = 6079432320. Its totient is φ = 566532096.

The previous prime is 2021012111. The next prime is 2021012129. The reversal of 2021012112 is 2112101202.

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

It is not an unprimeable number, because it can be changed into a prime (2021012111) 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, 38937 + ... + 74552.

It is an arithmetic number, because the mean of its divisors is an integer number (75992904).

Almost surely, 2^2021012112 is an apocalyptic number.

It is an amenable number.

2021012112 is an abundant number, since it is smaller than the sum of its proper divisors (4058420208).

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

2021012112 is a wasteful number, since it uses less digits than its factorization.

2021012112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113560 (or 113554 counting only the distinct ones).

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

The square root of 2021012112 is about 44955.6682966676. The cubic root of 2021012112 is about 1264.3179546495.

Adding to 2021012112 its reverse (2112101202), we get a palindrome (4133113314).

The spelling of 2021012112 in words is "two billion, twenty-one million, twelve thousand, one hundred twelve".