1321202130 has 64 divisors (see below), whose sum is σ = 3203988480. Its totient is φ = 348663744.

The previous prime is 1321202123. The next prime is 1321202131. The reversal of 1321202130 is 312021231.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (1321202131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1537641 + ... + 1538499.

It is an arithmetic number, because the mean of its divisors is an integer number (50062320).

Almost surely, 2^1321202130 is an apocalyptic number.

1321202130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321202130 is an abundant number, since it is smaller than the sum of its proper divisors (1882786350).

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

1321202130 is a wasteful number, since it uses less digits than its factorization.

1321202130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1321202130 is about 36348.3442538997. The cubic root of 1321202130 is about 1097.2942119992.

Adding to 1321202130 its reverse (312021231), we get a palindrome (1633223361).

The spelling of 1321202130 in words is "one billion, three hundred twenty-one million, two hundred two thousand, one hundred thirty".