2121377420 has 24 divisors (see below), whose sum is σ = 4456866624. Its totient is φ = 848174976.

The previous prime is 2121377413. The next prime is 2121377429. The reversal of 2121377420 is 247731212.

It is not an unprimeable number, because it can be changed into a prime (2121377429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25229 + ... + 69851.

It is an arithmetic number, because the mean of its divisors is an integer number (185702776).

Almost surely, 2^2121377420 is an apocalyptic number.

2121377420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121377420 is an abundant number, since it is smaller than the sum of its proper divisors (2335489204).

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

2121377420 is a wasteful number, since it uses less digits than its factorization.

2121377420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47009 (or 47007 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 2121377420 is about 46058.4131294164. The cubic root of 2121377420 is about 1284.9098171859.

The spelling of 2121377420 in words is "two billion, one hundred twenty-one million, three hundred seventy-seven thousand, four hundred twenty".