2121223130 has 32 divisors (see below), whose sum is σ = 4119646608. Its totient is φ = 781747200.

The previous prime is 2121223121. The next prime is 2121223141. The reversal of 2121223130 is 313221212.

It can be written as a sum of positive squares in 8 ways, for example, as 731648401 + 1389574729 = 27049^2 + 37277^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2121223099 and 2121223108.

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, 55250 + ... + 85410.

Almost surely, 2^2121223130 is an apocalyptic number.

2121223130 is a deficient number, since it is larger than the sum of its proper divisors (1998423478).

2121223130 is a wasteful number, since it uses less digits than its factorization.

2121223130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30722.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2121223130 is about 46056.7381606644. The cubic root of 2121223130 is about 1284.8786654854.

Adding to 2121223130 its reverse (313221212), we get a palindrome (2434444342).

The spelling of 2121223130 in words is "two billion, one hundred twenty-one million, two hundred twenty-three thousand, one hundred thirty".