2120021420 has 24 divisors (see below), whose sum is σ = 4856776848. Its totient is φ = 770916800.

The previous prime is 2120021417. The next prime is 2120021429. The reversal of 2120021420 is 241200212.

It is a junction number, because it is equal to n+sod(n) for n = 2120021395 and 2120021404.

It is not an unprimeable number, because it can be changed into a prime (2120021429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4818011 + ... + 4818450.

It is an arithmetic number, because the mean of its divisors is an integer number (202365702).

Almost surely, 2^2120021420 is an apocalyptic number.

2120021420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2120021420 is an abundant number, since it is smaller than the sum of its proper divisors (2736755428).

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

2120021420 is a wasteful number, since it uses less digits than its factorization.

2120021420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9636481 (or 9636479 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 2120021420 is about 46043.6903386338. The cubic root of 2120021420 is about 1284.6359842404.

Adding to 2120021420 its reverse (241200212), we get a palindrome (2361221632).

The spelling of 2120021420 in words is "two billion, one hundred twenty million, twenty-one thousand, four hundred twenty".