2021212013 has 4 divisors (see below), whose sum is σ = 2030275968. Its totient is φ = 2012148060.

The previous prime is 2021212007. The next prime is 2021212031. The reversal of 2021212013 is 3102121202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3102121202 = 2 ⋅1551060601.

It is a cyclic number.

It is not a de Polignac number, because 2021212013 - 2²⁰ = 2020163437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021212213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4531643 + ... + 4532088.

It is an arithmetic number, because the mean of its divisors is an integer number (507568992).

Almost surely, 2^2021212013 is an apocalyptic number.

It is an amenable number.

2021212013 is a deficient number, since it is larger than the sum of its proper divisors (9063955).

2021212013 is an equidigital number, since it uses as much as digits as its factorization.

2021212013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9063954.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2021212013 is about 44957.8915542088. The cubic root of 2021212013 is about 1264.3596383995.

Adding to 2021212013 its reverse (3102121202), we get a palindrome (5123333215).

The spelling of 2021212013 in words is "two billion, twenty-one million, two hundred twelve thousand, thirteen".