1301221537252 has 192 divisors, whose sum is σ = 2852723163136. Its totient is φ = 505681989120.

The previous prime is 1301221537223. The next prime is 1301221537283. The reversal of 1301221537252 is 2527351221031.

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, 3931182727 + ... + 3931183057.

Almost surely, 2^{1301221537252} 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 1301221537252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1426361581568).

1301221537252 is an abundant number, since it is smaller than the sum of its proper divisors (1551501625884).

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

1301221537252 is a wasteful number, since it uses less digits than its factorization.

1301221537252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066 (or 1064 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 34.

Adding to 1301221537252 its reverse (2527351221031), we get a palindrome (3828572758283).

The spelling of 1301221537252 in words is "one trillion, three hundred one billion, two hundred twenty-one million, five hundred thirty-seven thousand, two hundred fifty-two".