1212011312 has 40 divisors (see below), whose sum is σ = 2474707680. Its totient is φ = 573900800.

The previous prime is 1212011299. The next prime is 1212011323. The reversal of 1212011312 is 2131102121.

It is a super-2 number, since 2×1212011312² = 2937942840831922688, which contains 22 as substring.

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, 20864 + ... + 53472.

It is an arithmetic number, because the mean of its divisors is an integer number (61867692).

Almost surely, 2^1212011312 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 1212011312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1237353840).

1212011312 is an abundant number, since it is smaller than the sum of its proper divisors (1262696368).

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

1212011312 is a wasteful number, since it uses less digits than its factorization.

1212011312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32741 (or 32735 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1212011312 is about 34813.9528350344. The cubic root of 1212011312 is about 1066.1923392801.

Adding to 1212011312 its reverse (2131102121), we get a palindrome (3343113433).

It can be divided in two parts, 12120 and 11312, that added together give a palindrome (23432).

The spelling of 1212011312 in words is "one billion, two hundred twelve million, eleven thousand, three hundred twelve".