2011006621 has 8 divisors (see below), whose sum is σ = 2167859960. Its totient is φ = 1854461952.

The previous prime is 2011006601. The next prime is 2011006631. The reversal of 2011006621 is 1266001102.

It can be written as a sum of positive squares in 4 ways, for example, as 75446596 + 1935560025 = 8686^2 + 43995^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2011006621 - 2⁵ = 2011006589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011006601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63540 + ... + 89773.

It is an arithmetic number, because the mean of its divisors is an integer number (270982495).

Almost surely, 2^2011006621 is an apocalyptic number.

It is an amenable number.

2011006621 is a deficient number, since it is larger than the sum of its proper divisors (156853339).

2011006621 is a wasteful number, since it uses less digits than its factorization.

2011006621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154335.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 2011006621 is about 44844.2484717940. The cubic root of 2011006621 is about 1262.2280685573.

Adding to 2011006621 its reverse (1266001102), we get a palindrome (3277007723).

The spelling of 2011006621 in words is "two billion, eleven million, six thousand, six hundred twenty-one".