231021200030 has 16 divisors (see below), whose sum is σ = 417384031680. Its totient is φ = 92064952992.

The previous prime is 231021199987. The next prime is 231021200077. The reversal of 231021200030 is 30002120132.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 231021199978 and 231021200014.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42938054 + ... + 42943433.

It is an arithmetic number, because the mean of its divisors is an integer number (26086501980).

Almost surely, 2^231021200030 is an apocalyptic number.

231021200030 is a deficient number, since it is larger than the sum of its proper divisors (186362831650).

231021200030 is a wasteful number, since it uses less digits than its factorization.

231021200030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85881763.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 231021200030 its reverse (30002120132), we get a palindrome (261023320162).

The spelling of 231021200030 in words is "two hundred thirty-one billion, twenty-one million, two hundred thousand, thirty".