2012272261 has 2 divisors, whose sum is σ = 2012272262. Its totient is φ = 2012272260.

The previous prime is 2012272259. The next prime is 2012272307. The reversal of 2012272261 is 1622722102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2004263361 + 8008900 = 44769^2 + 2830^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012272261 - 2¹ = 2012272259 is a prime.

Together with 2012272259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2012272061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006136130 + 1006136131.

It is an arithmetic number, because the mean of its divisors is an integer number (1006136131).

Almost surely, 2^2012272261 is an apocalyptic number.

It is an amenable number.

2012272261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012272261 is an equidigital number, since it uses as much as digits as its factorization.

2012272261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 2012272261 is about 44858.3577608454. The cubic root of 2012272261 is about 1262.4928101541.

Adding to 2012272261 its reverse (1622722102), we get a palindrome (3634994363).

The spelling of 2012272261 in words is "two billion, twelve million, two hundred seventy-two thousand, two hundred sixty-one".