1261202211 has 8 divisors (see below), whose sum is σ = 1868447760. Its totient is φ = 840801456.

The previous prime is 1261202207. The next prime is 1261202213. The reversal of 1261202211 is 1122021621.

It is not a de Polignac number, because 1261202211 - 2² = 1261202207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1261202213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23355570 + ... + 23355623.

It is an arithmetic number, because the mean of its divisors is an integer number (233555970).

Almost surely, 2^1261202211 is an apocalyptic number.

1261202211 is a deficient number, since it is larger than the sum of its proper divisors (607245549).

1261202211 is an equidigital number, since it uses as much as digits as its factorization.

1261202211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46711202 (or 46711196 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 1261202211 is about 35513.4088901643. The cubic root of 1261202211 is about 1080.4257040916.

Adding to 1261202211 its reverse (1122021621), we get a palindrome (2383223832).

The spelling of 1261202211 in words is "one billion, two hundred sixty-one million, two hundred two thousand, two hundred eleven".