331121220312130 has 80 divisors (see below), whose sum is σ = 634173388466904. Its totient is φ = 124479352524800.

The previous prime is 331121220312083. The next prime is 331121220312131. The reversal of 331121220312130 is 31213022121133.

It can be written as a sum of positive squares in 20 ways, for example, as 141781721427369 + 189339498884761 = 11907213^2 + 13760069^2 .

It is a junction number, because it is equal to n+sod(n) for n = 331121220312095 and 331121220312104.

It is not an unprimeable number, because it can be changed into a prime (331121220312131) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 585199434 + ... + 585764986.

Almost surely, 2^{331121220312130} is an apocalyptic number.

331121220312130 is a deficient number, since it is larger than the sum of its proper divisors (303052168154774).

331121220312130 is an frugal number, since it uses more digits than its factorization.

331121220312130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566329 (or 566278 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 331121220312130 its reverse (31213022121133), we get a palindrome (362334242433263).

The spelling of 331121220312130 in words is "three hundred thirty-one trillion, one hundred twenty-one billion, two hundred twenty million, three hundred twelve thousand, one hundred thirty".