213021131101 has 4 divisors (see below), whose sum is σ = 224232769600. Its totient is φ = 201809492604.

The previous prime is 213021131093. The next prime is 213021131119. The reversal of 213021131101 is 101131120312.

It is a happy number.

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 213021131101 - 2³ = 213021131093 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 (213021131201) 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, 5605819221 + ... + 5605819258.

It is an arithmetic number, because the mean of its divisors is an integer number (56058192400).

Almost surely, 2^213021131101 is an apocalyptic number.

It is an amenable number.

213021131101 is a deficient number, since it is larger than the sum of its proper divisors (11211638499).

213021131101 is a wasteful number, since it uses less digits than its factorization.

213021131101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11211638498.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 213021131101 its reverse (101131120312), we get a palindrome (314152251413).

The spelling of 213021131101 in words is "two hundred thirteen billion, twenty-one million, one hundred thirty-one thousand, one hundred one".