231212220130 has 16 divisors (see below), whose sum is σ = 416684040120. Its totient is φ = 92373322752.

The previous prime is 231212220121. The next prime is 231212220131. The reversal of 231212220130 is 31022212132.

231212220130 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 178760685601 + 52451534529 = 422801^2 + 229023^2 .

It is a junction number, because it is equal to n+sod(n) for n = 231212220098 and 231212220107.

It is not an unprimeable number, because it can be changed into a prime (231212220131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13936959 + ... + 13953538.

Almost surely, 2^231212220130 is an apocalyptic number.

231212220130 is a deficient number, since it is larger than the sum of its proper divisors (185471819990).

231212220130 is a wasteful number, since it uses less digits than its factorization.

231212220130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27891333.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 231212220130 its reverse (31022212132), we get a palindrome (262234432262).

The spelling of 231212220130 in words is "two hundred thirty-one billion, two hundred twelve million, two hundred twenty thousand, one hundred thirty".