213444200121 has 8 divisors (see below), whose sum is σ = 286182168480. Its totient is φ = 141501182592.

The previous prime is 213444200119. The next prime is 213444200143. The reversal of 213444200121 is 121002444312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 213444200121 - 2¹ = 213444200119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213444200091 and 213444200100.

It is not an unprimeable number, because it can be changed into a prime (213444200171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198737080 + ... + 198738153.

It is an arithmetic number, because the mean of its divisors is an integer number (35772771060).

Almost surely, 2^213444200121 is an apocalyptic number.

It is an amenable number.

213444200121 is a deficient number, since it is larger than the sum of its proper divisors (72737968359).

213444200121 is a wasteful number, since it uses less digits than its factorization.

213444200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397475415.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 213444200121 its reverse (121002444312), we get a palindrome (334446644433).

The spelling of 213444200121 in words is "two hundred thirteen billion, four hundred forty-four million, two hundred thousand, one hundred twenty-one".