2117211025 has 12 divisors (see below), whose sum is σ = 2779774092. Its totient is φ = 1594135040.

The previous prime is 2117211023. The next prime is 2117211073. The reversal of 2117211025 is 5201127112.

It can be written as a sum of positive squares in 6 ways, for example, as 233998209 + 1883212816 = 15297^2 + 43396^2 .

It is not a de Polignac number, because 2117211025 - 2¹ = 2117211023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2117210987 and 2117211005.

It is not an unprimeable number, because it can be changed into a prime (2117211023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2490412 + ... + 2491261.

It is an arithmetic number, because the mean of its divisors is an integer number (231647841).

Almost surely, 2^2117211025 is an apocalyptic number.

2117211025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2117211025 is a deficient number, since it is larger than the sum of its proper divisors (662563067).

2117211025 is a wasteful number, since it uses less digits than its factorization.

2117211025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4981700 (or 4981695 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 22.

The square root of 2117211025 is about 46013.1614323554. The cubic root of 2117211025 is about 1284.0680762892.

Adding to 2117211025 its reverse (5201127112), we get a palindrome (7318338137).

The spelling of 2117211025 in words is "two billion, one hundred seventeen million, two hundred eleven thousand, twenty-five".