213212021101 has 4 divisors (see below), whose sum is σ = 213228393532. Its totient is φ = 213195648672.

The previous prime is 213212021089. The next prime is 213212021153. The reversal of 213212021101 is 101120212312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 93803763076 + 119408258025 = 306274^2 + 345555^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213212021101 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 (213212025101) 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, 8166666 + ... + 8192731.

It is an arithmetic number, because the mean of its divisors is an integer number (53307098383).

Almost surely, 2^213212021101 is an apocalyptic number.

It is an amenable number.

213212021101 is a deficient number, since it is larger than the sum of its proper divisors (16372431).

213212021101 is a wasteful number, since it uses less digits than its factorization.

213212021101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16372430.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 213212021101 its reverse (101120212312), we get a palindrome (314332233413).

The spelling of 213212021101 in words is "two hundred thirteen billion, two hundred twelve million, twenty-one thousand, one hundred one".