213121002122 has 8 divisors (see below), whose sum is σ = 365350289376. Its totient is φ = 91337572332.

The previous prime is 213121002119. The next prime is 213121002203. The reversal of 213121002122 is 221200121312.

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

It is a self number, because there is not a number n which added to its sum of digits gives 213121002122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7611464348 + ... + 7611464375.

It is an arithmetic number, because the mean of its divisors is an integer number (45668786172).

Almost surely, 2^213121002122 is an apocalyptic number.

213121002122 is a deficient number, since it is larger than the sum of its proper divisors (152229287254).

213121002122 is a wasteful number, since it uses less digits than its factorization.

213121002122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15222928732.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 213121002122 its reverse (221200121312), we get a palindrome (434321123434).

The spelling of 213121002122 in words is "two hundred thirteen billion, one hundred twenty-one million, two thousand, one hundred twenty-two".