213221032101 has 112 divisors (see below), whose sum is σ = 422015799168. Its totient is φ = 104248166400.

The previous prime is 213221032099. The next prime is 213221032133. The reversal of 213221032101 is 101230122312.

213221032101 is a `hidden beast` number, since 2 + 132 + 210 + 321 + 0 + 1 = 666.

It is not a de Polignac number, because 213221032101 - 2¹ = 213221032099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213221032151) by changing a digit.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 842541 + ... + 1065981.

Almost surely, 2^213221032101 is an apocalyptic number.

213221032101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

213221032101 is a deficient number, since it is larger than the sum of its proper divisors (208794767067).

213221032101 is a wasteful number, since it uses less digits than its factorization.

213221032101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223494 (or 223479 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 213221032101 its reverse (101230122312), we get a palindrome (314451154413).

The spelling of 213221032101 in words is "two hundred thirteen billion, two hundred twenty-one million, thirty-two thousand, one hundred one".