213102020221 has 8 divisors (see below), whose sum is σ = 222583031424. Its totient is φ = 203638984560.

The previous prime is 213102020111. The next prime is 213102020237. The reversal of 213102020221 is 122020201312.

It is a happy number.

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 213102020221 - 2¹³ = 213102012029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213102020195 and 213102020204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213102020251) 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, 4469646 + ... + 4517071.

It is an arithmetic number, because the mean of its divisors is an integer number (27822878928).

Almost surely, 2^213102020221 is an apocalyptic number.

It is an amenable number.

213102020221 is a deficient number, since it is larger than the sum of its proper divisors (9481011203).

213102020221 is a wasteful number, since it uses less digits than its factorization.

213102020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8987771.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 213102020221 its reverse (122020201312), we get a palindrome (335122221533).

The spelling of 213102020221 in words is "two hundred thirteen billion, one hundred two million, twenty thousand, two hundred twenty-one".