1209807212 has 12 divisors (see below), whose sum is σ = 2117406816. Its totient is φ = 604833840.

The previous prime is 1209807191. The next prime is 1209807217. The reversal of 1209807212 is 2127089021.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1209807217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55058 + ... + 73830.

It is an arithmetic number, because the mean of its divisors is an integer number (176450568).

Almost surely, 2^1209807212 is an apocalyptic number.

It is an amenable number.

1209807212 is a deficient number, since it is larger than the sum of its proper divisors (907599604).

1209807212 is a wasteful number, since it uses less digits than its factorization.

1209807212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34888 (or 34886 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 1209807212 is about 34782.2830188014. The cubic root of 1209807212 is about 1065.5456400075.

The spelling of 1209807212 in words is "one billion, two hundred nine million, eight hundred seven thousand, two hundred twelve".