2112205405 has 16 divisors (see below), whose sum is σ = 2625663600. Its totient is φ = 1630013440.

The previous prime is 2112205393. The next prime is 2112205507. The reversal of 2112205405 is 5045022112.

It can be written as a sum of positive squares in 8 ways, for example, as 56580484 + 2055624921 = 7522^2 + 45339^2 .

It is not a de Polignac number, because 2112205405 - 2⁵ = 2112205373 is a prime.

It is a super-2 number, since 2×2112205405² = 8922823345822428050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39640 + ... + 76129.

It is an arithmetic number, because the mean of its divisors is an integer number (164103975).

Almost surely, 2^2112205405 is an apocalyptic number.

It is an amenable number.

2112205405 is a deficient number, since it is larger than the sum of its proper divisors (513458195).

2112205405 is a wasteful number, since it uses less digits than its factorization.

2112205405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115904.

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

The square root of 2112205405 is about 45958.7358942780. The cubic root of 2112205405 is about 1283.0553243109.

Adding to 2112205405 its reverse (5045022112), we get a palindrome (7157227517).

The spelling of 2112205405 in words is "two billion, one hundred twelve million, two hundred five thousand, four hundred five".