1213063561242 has 128 divisors (see below), whose sum is σ = 2977463596800. Its totient is φ = 363724204032.

The previous prime is 1213063561093. The next prime is 1213063561261. The reversal of 1213063561242 is 2421653603121.

1213063561242 is a `hidden beast` number, since 1 + 2 + 1 + 3 + 0 + 6 + 35 + 612 + 4 + 2 = 666.

It is a super-2 number, since 2×1213063561242² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1213063561197 and 1213063561206.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13024134 + ... + 13116942.

It is an arithmetic number, because the mean of its divisors is an integer number (23261434350).

Almost surely, 2^{1213063561242} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1213063561242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1488731798400).

1213063561242 is an abundant number, since it is smaller than the sum of its proper divisors (1764400035558).

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

1213063561242 is a wasteful number, since it uses less digits than its factorization.

1213063561242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93309 (or 93303 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 1213063561242 in words is "one trillion, two hundred thirteen billion, sixty-three million, five hundred sixty-one thousand, two hundred forty-two".