2111521040 has 40 divisors (see below), whose sum is σ = 5198071320. Its totient is φ = 794925056.

The previous prime is 2111521037. The next prime is 2111521081. The reversal of 2111521040 is 401251112.

It can be written as a sum of positive squares in 4 ways, for example, as 484528144 + 1626992896 = 22012^2 + 40336^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×2111521040² = 8917042204725363200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 774935 + ... + 777654.

It is an arithmetic number, because the mean of its divisors is an integer number (129951783).

Almost surely, 2^2111521040 is an apocalyptic number.

2111521040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2111521040 is an abundant number, since it is smaller than the sum of its proper divisors (3086550280).

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

2111521040 is a wasteful number, since it uses less digits than its factorization.

2111521040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1552619 (or 1552613 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 2111521040 is about 45951.2898622008. The cubic root of 2111521040 is about 1282.9167372515.

Adding to 2111521040 its reverse (401251112), we get a palindrome (2512772152).

It can be divided in two parts, 211 and 1521040, that added together give a palindrome (1521251).

The spelling of 2111521040 in words is "two billion, one hundred eleven million, five hundred twenty-one thousand, forty".