2121943950 has 144 divisors (see below), whose sum is σ = 6598625280. Its totient is φ = 478820160.

The previous prime is 2121943939. The next prime is 2121943951. The reversal of 2121943950 is 593491212.

2121943950 is a `hidden beast` number, since 2 + 1 + 219 + 439 + 5 + 0 = 666.

It is a super-2 number, since 2×2121943950² = 9005292253883205000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121943951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 244587 + ... + 253113.

Almost surely, 2^2121943950 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2121943950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3299312640).

2121943950 is an abundant number, since it is smaller than the sum of its proper divisors (4476681330).

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

2121943950 is a wasteful number, since it uses less digits than its factorization.

2121943950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8631 (or 8623 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 2121943950 is about 46064.5628439042. The cubic root of 2121943950 is about 1285.0241886568.

The spelling of 2121943950 in words is "two billion, one hundred twenty-one million, nine hundred forty-three thousand, nine hundred fifty".