31020021230 has 16 divisors (see below), whose sum is σ = 60912041904. Its totient is φ = 11280007680.

The previous prime is 31020021229. The next prime is 31020021239. The reversal of 31020021230 is 3212002013.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31020021239) 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, 140999987 + ... + 141000206.

It is an arithmetic number, because the mean of its divisors is an integer number (3807002619).

Almost surely, 2^31020021230 is an apocalyptic number.

31020021230 is a deficient number, since it is larger than the sum of its proper divisors (29892020674).

31020021230 is a wasteful number, since it uses less digits than its factorization.

31020021230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282000211.

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

Adding to 31020021230 its reverse (3212002013), we get a palindrome (34232023243).

The spelling of 31020021230 in words is "thirty-one billion, twenty million, twenty-one thousand, two hundred thirty".