31221022030 has 32 divisors (see below), whose sum is σ = 61913753568. Its totient is φ = 11240688000.

The previous prime is 31221021989. The next prime is 31221022039. The reversal of 31221022030 is 3022012213.

It is a junction number, because it is equal to n+sod(n) for n = 31221021995 and 31221022013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31221022039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1393977 + ... + 1416196.

It is an arithmetic number, because the mean of its divisors is an integer number (1934804799).

Almost surely, 2^31221022030 is an apocalyptic number.

31221022030 is a deficient number, since it is larger than the sum of its proper divisors (30692731538).

31221022030 is a wasteful number, since it uses less digits than its factorization.

31221022030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2810292.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 31221022030 its reverse (3022012213), we get a palindrome (34243034243).

The spelling of 31221022030 in words is "thirty-one billion, two hundred twenty-one million, twenty-two thousand, thirty".