2021120012 has 6 divisors (see below), whose sum is σ = 3536960028. Its totient is φ = 1010560004.

The previous prime is 2021119999. The next prime is 2021120047. The reversal of 2021120012 is 2100211202.

It is a happy number.

It is a super-2 number, since 2×2021120012² = 8169852205813760288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2021119975 and 2021120002.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252639998 + ... + 252640005.

It is an arithmetic number, because the mean of its divisors is an integer number (589493338).

Almost surely, 2^2021120012 is an apocalyptic number.

It is an amenable number.

2021120012 is a deficient number, since it is larger than the sum of its proper divisors (1515840016).

2021120012 is a wasteful number, since it uses less digits than its factorization.

2021120012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505280007 (or 505280005 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 2021120012 is about 44956.8683517880. The cubic root of 2021120012 is about 1264.3404545113.

Adding to 2021120012 its reverse (2100211202), we get a palindrome (4121331214).

The spelling of 2021120012 in words is "two billion, twenty-one million, one hundred twenty thousand, twelve".