1321213050 has 72 divisors (see below), whose sum is σ = 3557825856. Its totient is φ = 351513120.

The previous prime is 1321213043. The next prime is 1321213093. The reversal of 1321213050 is 503121231.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 207007 + ... + 213293.

It is an arithmetic number, because the mean of its divisors is an integer number (49414248).

Almost surely, 2^1321213050 is an apocalyptic number.

1321213050 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 1321213050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1778912928).

1321213050 is an abundant number, since it is smaller than the sum of its proper divisors (2236612806).

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

1321213050 is a wasteful number, since it uses less digits than its factorization.

1321213050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6772 (or 6764 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 1321213050 is about 36348.4944667589. The cubic root of 1321213050 is about 1097.2972351096.

Adding to 1321213050 its reverse (503121231), we get a palindrome (1824334281).

It can be divided in two parts, 13212 and 13050, that added together give a palindrome (26262).

The spelling of 1321213050 in words is "one billion, three hundred twenty-one million, two hundred thirteen thousand, fifty".