13213121250 has 160 divisors (see below), whose sum is σ = 38663323776. Its totient is φ = 2946240000.

The previous prime is 13213121203. The next prime is 13213121279. The reversal of 13213121250 is 5212131231.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1070112 + ... + 1082388.

Almost surely, 2^13213121250 is an apocalyptic number.

13213121250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13213121250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19331661888).

13213121250 is an abundant number, since it is smaller than the sum of its proper divisors (25450202526).

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

13213121250 is a wasteful number, since it uses less digits than its factorization.

13213121250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12350 (or 12335 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 13213121250 its reverse (5212131231), we get a palindrome (18425252481).

The spelling of 13213121250 in words is "thirteen billion, two hundred thirteen million, one hundred twenty-one thousand, two hundred fifty".