213011032021 has 4 divisors (see below), whose sum is σ = 213138814752. Its totient is φ = 212883249292.

The previous prime is 213011032007. The next prime is 213011032043. The reversal of 213011032021 is 120230110312.

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.

It is a cyclic number.

It is not a de Polignac number, because 213011032021 - 2¹³ = 213011023829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213011031986 and 213011032004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213011002021) 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, 63888865 + ... + 63892198.

It is an arithmetic number, because the mean of its divisors is an integer number (53284703688).

Almost surely, 2^213011032021 is an apocalyptic number.

It is an amenable number.

213011032021 is a deficient number, since it is larger than the sum of its proper divisors (127782731).

213011032021 is a wasteful number, since it uses less digits than its factorization.

213011032021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127782730.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 213011032021 its reverse (120230110312), we get a palindrome (333241142333).

The spelling of 213011032021 in words is "two hundred thirteen billion, eleven million, thirty-two thousand, twenty-one".