213112121101 has 32 divisors (see below), whose sum is σ = 239730192000. Its totient is φ = 187797792000.

The previous prime is 213112121071. The next prime is 213112121153. The reversal of 213112121101 is 101121211312.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 213112121101 - 2⁹ = 213112120589 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 (213112121501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29378991 + ... + 29386243.

It is an arithmetic number, because the mean of its divisors is an integer number (7491568500).

Almost surely, 2^213112121101 is an apocalyptic number.

It is an amenable number.

213112121101 is a deficient number, since it is larger than the sum of its proper divisors (26618070899).

213112121101 is a wasteful number, since it uses less digits than its factorization.

213112121101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7917.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 213112121101 its reverse (101121211312), we get a palindrome (314233332413).

It can be divided in two parts, 21311 and 2121101, that added together give a palindrome (2142412).

The spelling of 213112121101 in words is "two hundred thirteen billion, one hundred twelve million, one hundred twenty-one thousand, one hundred one".