1211219872 has 24 divisors (see below), whose sum is σ = 2440047456. Its totient is φ = 591525312.

The previous prime is 1211219797. The next prime is 1211219873. The reversal of 1211219872 is 2789121121.

It is not an unprimeable number, because it can be changed into a prime (1211219873) 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, 438748 + ... + 441499.

It is an arithmetic number, because the mean of its divisors is an integer number (101668644).

Almost surely, 2^1211219872 is an apocalyptic number.

It is an amenable number.

1211219872 is an abundant number, since it is smaller than the sum of its proper divisors (1228827584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211219872 is an equidigital number, since it uses as much as digits as its factorization.

1211219872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880300 (or 880292 counting only the distinct ones).

The product of its digits is 4032, while the sum is 34.

The square root of 1211219872 is about 34802.5842718612. The cubic root of 1211219872 is about 1065.9602152078.

The spelling of 1211219872 in words is "one billion, two hundred eleven million, two hundred nineteen thousand, eight hundred seventy-two".