1020012271 has 2 divisors, whose sum is σ = 1020012272. Its totient is φ = 1020012270.

The previous prime is 1020012269. The next prime is 1020012281. The reversal of 1020012271 is 1722100201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1020012271 - 2¹ = 1020012269 is a prime.

Together with 1020012269, 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 (1020012281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510006135 + 510006136.

It is an arithmetic number, because the mean of its divisors is an integer number (510006136).

Almost surely, 2^1020012271 is an apocalyptic number.

1020012271 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020012271 is an equidigital number, since it uses as much as digits as its factorization.

1020012271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 1020012271 is about 31937.6309547217. The cubic root of 1020012271 is about 1006.6267462326.

Adding to 1020012271 its reverse (1722100201), we get a palindrome (2742112472).

The spelling of 1020012271 in words is "one billion, twenty million, twelve thousand, two hundred seventy-one".