2021102012 has 12 divisors (see below), whose sum is σ = 3537503256. Its totient is φ = 1010386800.

The previous prime is 2021101993. The next prime is 2021102047. The reversal of 2021102012 is 2102011202.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2021101984 and 2021102002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10898 + ... + 64505.

It is an arithmetic number, because the mean of its divisors is an integer number (294791938).

Almost surely, 2^2021102012 is an apocalyptic number.

It is an amenable number.

2021102012 is a deficient number, since it is larger than the sum of its proper divisors (1516401244).

2021102012 is a wasteful number, since it uses less digits than its factorization.

2021102012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82108 (or 82106 counting only the distinct ones).

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

The square root of 2021102012 is about 44956.6681594622. The cubic root of 2021102012 is about 1264.3367011145.

Adding to 2021102012 its reverse (2102011202), we get a palindrome (4123113214).

The spelling of 2021102012 in words is "two billion, twenty-one million, one hundred two thousand, twelve".