2047100021 has 4 divisors (see below), whose sum is σ = 2055886092. Its totient is φ = 2038313952.

The previous prime is 2047100009. The next prime is 2047100023. The reversal of 2047100021 is 1200017402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 389470225 + 1657629796 = 19735^2 + 40714^2 .

It is a cyclic number.

It is not a de Polignac number, because 2047100021 - 2²² = 2042905717 is a prime.

It is a super-3 number, since 3×2047100021³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2047100023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4392686 + ... + 4393151.

It is an arithmetic number, because the mean of its divisors is an integer number (513971523).

Almost surely, 2^2047100021 is an apocalyptic number.

It is an amenable number.

2047100021 is a deficient number, since it is larger than the sum of its proper divisors (8786071).

2047100021 is an equidigital number, since it uses as much as digits as its factorization.

2047100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8786070.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 2047100021 is about 45244.8894462126. The cubic root of 2047100021 is about 1269.7347950994.

Adding to 2047100021 its reverse (1200017402), we get a palindrome (3247117423).

The spelling of 2047100021 in words is "two billion, forty-seven million, one hundred thousand, twenty-one".