2111521041 has 24 divisors (see below), whose sum is σ = 3614787904. Its totient is φ = 1206582480.

The previous prime is 2111521037. The next prime is 2111521081. The reversal of 2111521041 is 1401251112.

It is not a de Polignac number, because 2111521041 - 2² = 2111521037 is a prime.

It is a super-2 number, since 2×2111521041² = 8917042213171447362, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2111521021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 618970 + ... + 622371.

Almost surely, 2^2111521041 is an apocalyptic number.

2111521041 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2111521041 is a deficient number, since it is larger than the sum of its proper divisors (1503266863).

2111521041 is an equidigital number, since it uses as much as digits as its factorization.

2111521041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241363 (or 1241351 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

The square root of 2111521041 is about 45951.2898730819. The cubic root of 2111521041 is about 1282.9167374540.

Adding to 2111521041 its reverse (1401251112), we get a palindrome (3512772153).

It can be divided in two parts, 21115210 and 41, that added together give a triangular number (21115251 = T₆₄₉₈).

The spelling of 2111521041 in words is "two billion, one hundred eleven million, five hundred twenty-one thousand, forty-one".