1212263712 has 192 divisors, whose sum is σ = 3881001600. Its totient is φ = 365091840.

The previous prime is 1212263653. The next prime is 1212263777. The reversal of 1212263712 is 2173622121.

1212263712 is a `hidden beast` number, since 1 + 2 + 1 + 22 + 637 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2176138 + ... + 2176694.

It is an arithmetic number, because the mean of its divisors is an integer number (20213550).

Almost surely, 2^1212263712 is an apocalyptic number.

1212263712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212263712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1940500800).

1212263712 is an abundant number, since it is smaller than the sum of its proper divisors (2668737888).

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

1212263712 is a wasteful number, since it uses less digits than its factorization.

1212263712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816 (or 802 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 1212263712 is about 34817.5776296973. The cubic root of 1212263712 is about 1066.2663452638.

Adding to 1212263712 its reverse (2173622121), we get a palindrome (3385885833).

The spelling of 1212263712 in words is "one billion, two hundred twelve million, two hundred sixty-three thousand, seven hundred twelve".