213143402021 has 8 divisors (see below), whose sum is σ = 232888577088. Its totient is φ = 193459644000.

The previous prime is 213143401981. The next prime is 213143402053. The reversal of 213143402021 is 120204341312.

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 213143402021 - 2³⁴ = 195963532837 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 (213143402221) 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, 15347000 + ... + 15360881.

It is an arithmetic number, because the mean of its divisors is an integer number (29111072136).

Almost surely, 2^213143402021 is an apocalyptic number.

It is an amenable number.

213143402021 is a deficient number, since it is larger than the sum of its proper divisors (19745175067).

213143402021 is a wasteful number, since it uses less digits than its factorization.

213143402021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30708523.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 213143402021 its reverse (120204341312), we get a palindrome (333347743333).

The spelling of 213143402021 in words is "two hundred thirteen billion, one hundred forty-three million, four hundred two thousand, twenty-one".