2147051021 has 2 divisors, whose sum is σ = 2147051022. Its totient is φ = 2147051020.

The previous prime is 2147050981. The next prime is 2147051063. The reversal of 2147051021 is 1201507412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1136701225 + 1010349796 = 33715^2 + 31786^2 .

It is a cyclic number.

It is not a de Polignac number, because 2147051021 - 2²² = 2142856717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2147051521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1073525510 + 1073525511.

It is an arithmetic number, because the mean of its divisors is an integer number (1073525511).

Almost surely, 2^2147051021 is an apocalyptic number.

It is an amenable number.

2147051021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2147051021 is an equidigital number, since it uses as much as digits as its factorization.

2147051021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 2147051021 is about 46336.2819073779. The cubic root of 2147051021 is about 1290.0725117984.

Adding to 2147051021 its reverse (1201507412), we get a palindrome (3348558433).

The spelling of 2147051021 in words is "two billion, one hundred forty-seven million, fifty-one thousand, twenty-one".