1212521261344 has 48 divisors (see below), whose sum is σ = 2435884799040. Its totient is φ = 593918590720.

The previous prime is 1212521261339. The next prime is 1212521261383. The reversal of 1212521261344 is 4431621252121.

It is a super-2 number, since 2×1212521261344² (a number of 25 digits) 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, 575229 + ... + 1660099.

It is an arithmetic number, because the mean of its divisors is an integer number (50747599980).

Almost surely, 2^{1212521261344} 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 1212521261344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1217942399520).

1212521261344 is an abundant number, since it is smaller than the sum of its proper divisors (1223363537696).

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

1212521261344 is a wasteful number, since it uses less digits than its factorization.

1212521261344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085593 (or 1085585 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The spelling of 1212521261344 in words is "one trillion, two hundred twelve billion, five hundred twenty-one million, two hundred sixty-one thousand, three hundred forty-four".