1212722272 has 48 divisors (see below), whose sum is σ = 2574558000. Its totient is φ = 560424960.

The previous prime is 1212722267. The next prime is 1212722299. The reversal of 1212722272 is 2722272121.

It is a self number, because there is not a number n which added to its sum of digits gives 1212722272.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 604 + ... + 49252.

It is an arithmetic number, because the mean of its divisors is an integer number (53636625).

Almost surely, 2^1212722272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212722272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1287279000).

1212722272 is an abundant number, since it is smaller than the sum of its proper divisors (1361835728).

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

1212722272 is a wasteful number, since it uses less digits than its factorization.

1212722272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48719 (or 48711 counting only the distinct ones).

The product of its digits is 3136, while the sum is 28.

The square root of 1212722272 is about 34824.1621866198. The cubic root of 1212722272 is about 1066.4007729609.

Adding to 1212722272 its reverse (2722272121), we get a palindrome (3934994393).

The spelling of 1212722272 in words is "one billion, two hundred twelve million, seven hundred twenty-two thousand, two hundred seventy-two".