213022021 has 8 divisors (see below), whose sum is σ = 223268544. Its totient is φ = 202857600.

The previous prime is 213022003. The next prime is 213022031. The reversal of 213022021 is 120220312.

213022021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 213022021 - 2²⁷ = 78804293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213021992 and 213022010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213022031) 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, 15180 + ... + 25621.

It is an arithmetic number, because the mean of its divisors is an integer number (27908568).

Almost surely, 2^213022021 is an apocalyptic number.

It is an amenable number.

213022021 is a deficient number, since it is larger than the sum of its proper divisors (10246523).

213022021 is a wasteful number, since it uses less digits than its factorization.

213022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41051.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 213022021 is about 14595.2739268573. The cubic root of 213022021 is about 597.2298420953.

Adding to 213022021 its reverse (120220312), we get a palindrome (333242333).

The spelling of 213022021 in words is "two hundred thirteen million, twenty-two thousand, twenty-one".