2021213123 has 8 divisors (see below), whose sum is σ = 2056711008. Its totient is φ = 1985926464.

The previous prime is 2021213093. The next prime is 2021213137. The reversal of 2021213123 is 3213121202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2021213123 - 2⁶ = 2021213059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021213143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33440 + ... + 71837.

It is an arithmetic number, because the mean of its divisors is an integer number (257088876).

Almost surely, 2^2021213123 is an apocalyptic number.

2021213123 is a deficient number, since it is larger than the sum of its proper divisors (35497885).

2021213123 is a wasteful number, since it uses less digits than its factorization.

2021213123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105613.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2021213123 is about 44957.9038990921. The cubic root of 2021213123 is about 1264.3598698512.

Adding to 2021213123 its reverse (3213121202), we get a palindrome (5234334325).

The spelling of 2021213123 in words is "two billion, twenty-one million, two hundred thirteen thousand, one hundred twenty-three".