213122201021 has 8 divisors (see below), whose sum is σ = 215334631680. Its totient is φ = 210910082688.

The previous prime is 213122200999. The next prime is 213122201023. The reversal of 213122201021 is 120102221312.

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 213122201021 - 2¹⁸ = 213121938877 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 (213122201023) 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, 1447550 + ... + 1587968.

It is an arithmetic number, because the mean of its divisors is an integer number (26916828960).

Almost surely, 2^213122201021 is an apocalyptic number.

It is an amenable number.

213122201021 is a deficient number, since it is larger than the sum of its proper divisors (2212430659).

213122201021 is a wasteful number, since it uses less digits than its factorization.

213122201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156163.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 213122201021 its reverse (120102221312), we get a palindrome (333224422333).

The spelling of 213122201021 in words is "two hundred thirteen billion, one hundred twenty-two million, two hundred one thousand, twenty-one".