1212230765772 has 144 divisors (see below), whose sum is σ = 3309604945920. Its totient is φ = 371905858944.

The previous prime is 1212230765761. The next prime is 1212230765777. The reversal of 1212230765772 is 2775670322121.

1212230765772 is a `hidden beast` number, since 1 + 2 + 1 + 2 + 2 + 3 + 0 + 76 + 577 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (1212230765777) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 261310629 + ... + 261315267.

It is an arithmetic number, because the mean of its divisors is an integer number (22983367680).

Almost surely, 2^{1212230765772} is an apocalyptic number.

1212230765772 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 1212230765772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1654802472960).

1212230765772 is an abundant number, since it is smaller than the sum of its proper divisors (2097374180148).

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

1212230765772 is a wasteful number, since it uses less digits than its factorization.

1212230765772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6172 (or 6167 counting only the distinct ones).

The product of its (nonzero) digits is 493920, while the sum is 45.

The spelling of 1212230765772 in words is "one trillion, two hundred twelve billion, two hundred thirty million, seven hundred sixty-five thousand, seven hundred seventy-two".