2121200030 has 8 divisors (see below), whose sum is σ = 3818160072. Its totient is φ = 848480008.

The previous prime is 2121200023. The next prime is 2121200057. The reversal of 2121200030 is 300021212.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 2121199984 and 2121200020.

It is a congruent number.

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, 106059992 + ... + 106060011.

It is an arithmetic number, because the mean of its divisors is an integer number (477270009).

Almost surely, 2^2121200030 is an apocalyptic number.

2121200030 is a deficient number, since it is larger than the sum of its proper divisors (1696960042).

2121200030 is a wasteful number, since it uses less digits than its factorization.

2121200030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212120010.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 2121200030 is about 46056.4873823439. The cubic root of 2121200030 is about 1284.8740013831.

Adding to 2121200030 its reverse (300021212), we get a palindrome (2421221242).

The spelling of 2121200030 in words is "two billion, one hundred twenty-one million, two hundred thousand, thirty".