1213534402212 has 96 divisors (see below), whose sum is σ = 3161275375104. Its totient is φ = 359135481600.

The previous prime is 1213534402211. The next prime is 1213534402237. The reversal of 1213534402212 is 2122044353121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1213534402212.

It is not an unprimeable number, because it can be changed into a prime (1213534402211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67518387 + ... + 67536357.

It is an arithmetic number, because the mean of its divisors is an integer number (32929951824).

Almost surely, 2^{1213534402212} is an apocalyptic number.

1213534402212 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 1213534402212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1580637687552).

1213534402212 is an abundant number, since it is smaller than the sum of its proper divisors (1947740972892).

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

1213534402212 is a wasteful number, since it uses less digits than its factorization.

1213534402212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29929 (or 29927 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 1213534402212 its reverse (2122044353121), we get a palindrome (3335578755333).

The spelling of 1213534402212 in words is "one trillion, two hundred thirteen billion, five hundred thirty-four million, four hundred two thousand, two hundred twelve".