2121213030 has 32 divisors (see below), whose sum is σ = 5137624800. Its totient is φ = 560466432.

The previous prime is 2121213007. The next prime is 2121213041. The reversal of 2121213030 is 303121212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 321075 + ... + 327614.

It is an arithmetic number, because the mean of its divisors is an integer number (160550775).

Almost surely, 2^2121213030 is an apocalyptic number.

2121213030 is an abundant number, since it is smaller than the sum of its proper divisors (3016411770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121213030 is a wasteful number, since it uses less digits than its factorization.

2121213030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648808.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 2121213030 is about 46056.6285131684. The cubic root of 2121213030 is about 1284.8766262067.

Adding to 2121213030 its reverse (303121212), we get a palindrome (2424334242).

The spelling of 2121213030 in words is "two billion, one hundred twenty-one million, two hundred thirteen thousand, thirty".