213111344121 has 32 divisors (see below), whose sum is σ = 313502821632. Its totient is φ = 127959886080.

The previous prime is 213111344107. The next prime is 213111344137. The reversal of 213111344121 is 121443111312.

It is not a de Polignac number, because 213111344121 - 2⁶ = 213111344057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213111344091 and 213111344100.

It is not an unprimeable number, because it can be changed into a prime (213111344821) 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, 89316 + ... + 658938.

It is an arithmetic number, because the mean of its divisors is an integer number (9796963176).

Almost surely, 2^213111344121 is an apocalyptic number.

It is an amenable number.

213111344121 is a deficient number, since it is larger than the sum of its proper divisors (100391477511).

213111344121 is a wasteful number, since it uses less digits than its factorization.

213111344121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569873.

The product of its digits is 576, while the sum is 24.

Adding to 213111344121 its reverse (121443111312), we get a palindrome (334554455433).

The spelling of 213111344121 in words is "two hundred thirteen billion, one hundred eleven million, three hundred forty-four thousand, one hundred twenty-one".