7127051021 has 2 divisors, whose sum is σ = 7127051022. Its totient is φ = 7127051020.

The previous prime is 7127050979. The next prime is 7127051047. The reversal of 7127051021 is 1201507217.

It is an a-pointer prime, because the next prime (7127051047) can be obtained adding 7127051021 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4434894025 + 2692156996 = 66595^2 + 51886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7127051021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7127051081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3563525510 + 3563525511.

It is an arithmetic number, because the mean of its divisors is an integer number (3563525511).

Almost surely, 2^7127051021 is an apocalyptic number.

It is an amenable number.

7127051021 is a deficient number, since it is larger than the sum of its proper divisors (1).

7127051021 is an equidigital number, since it uses as much as digits as its factorization.

7127051021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 980, while the sum is 26.

The square root of 7127051021 is about 84421.8634063475. The cubic root of 7127051021 is about 1924.4351878456.

Adding to 7127051021 its reverse (1201507217), we get a palindrome (8328558238).

The spelling of 7127051021 in words is "seven billion, one hundred twenty-seven million, fifty-one thousand, twenty-one".