2120221525 has 24 divisors (see below), whose sum is σ = 2692220544. Its totient is φ = 1655908800.

The previous prime is 2120221501. The next prime is 2120221531. The reversal of 2120221525 is 5251220212.

It is not a de Polignac number, because 2120221525 - 2¹¹ = 2120219477 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2120221496 and 2120221505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 177027 + ... + 188623.

It is an arithmetic number, because the mean of its divisors is an integer number (112175856).

Almost surely, 2^2120221525 is an apocalyptic number.

2120221525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2120221525 is a deficient number, since it is larger than the sum of its proper divisors (571999019).

2120221525 is a wasteful number, since it uses less digits than its factorization.

2120221525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11781 (or 11776 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 2120221525 is about 46045.8632778233. The cubic root of 2120221525 is about 1284.6764011270.

Adding to 2120221525 its reverse (5251220212), we get a palindrome (7371441737).

The spelling of 2120221525 in words is "two billion, one hundred twenty million, two hundred twenty-one thousand, five hundred twenty-five".