2612520221 has 2 divisors, whose sum is σ = 2612520222. Its totient is φ = 2612520220.

The previous prime is 2612520217. The next prime is 2612520223. The reversal of 2612520221 is 1220252162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1587624025 + 1024896196 = 39845^2 + 32014^2 .

It is a cyclic number.

It is not a de Polignac number, because 2612520221 - 2² = 2612520217 is a prime.

Together with 2612520223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2612520223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1306260110 + 1306260111.

It is an arithmetic number, because the mean of its divisors is an integer number (1306260111).

Almost surely, 2^2612520221 is an apocalyptic number.

It is an amenable number.

2612520221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2612520221 is an equidigital number, since it uses as much as digits as its factorization.

2612520221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 2612520221 is about 51112.8185585573. The cubic root of 2612520221 is about 1377.2725344021.

Adding to 2612520221 its reverse (1220252162), we get a palindrome (3832772383).

The spelling of 2612520221 in words is "two billion, six hundred twelve million, five hundred twenty thousand, two hundred twenty-one".