1211862116 has 6 divisors (see below), whose sum is σ = 2120758710. Its totient is φ = 605931056.

The previous prime is 1211862103. The next prime is 1211862143. The reversal of 1211862116 is 6112681121.

It can be written as a sum of positive squares in only one way, i.e., 1195084900 + 16777216 = 34570^2 + 4096^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 151482761 + ... + 151482768.

It is an arithmetic number, because the mean of its divisors is an integer number (353459785).

Almost surely, 2^1211862116 is an apocalyptic number.

It is an amenable number.

1211862116 is a deficient number, since it is larger than the sum of its proper divisors (908896594).

1211862116 is a wasteful number, since it uses less digits than its factorization.

1211862116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302965533 (or 302965531 counting only the distinct ones).

The product of its digits is 1152, while the sum is 29.

The square root of 1211862116 is about 34811.8100075247. The cubic root of 1211862116 is about 1066.1485888194.

The spelling of 1211862116 in words is "one billion, two hundred eleven million, eight hundred sixty-two thousand, one hundred sixteen".