31311001220230 has 32 divisors (see below), whose sum is σ = 59682028849056. Its totient is φ = 11786299359744.

The previous prime is 31311001220201. The next prime is 31311001220287. The reversal of 31311001220230 is 3202210011313.

It is a super-2 number, since 2×31311001220230² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31311001220198 and 31311001220207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9250524 + ... + 12173503.

It is an arithmetic number, because the mean of its divisors is an integer number (1865063401533).

Almost surely, 2^{31311001220230} is an apocalyptic number.

31311001220230 is a deficient number, since it is larger than the sum of its proper divisors (28371027628826).

31311001220230 is a wasteful number, since it uses less digits than its factorization.

31311001220230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21432648.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31311001220230 its reverse (3202210011313), we get a palindrome (34513211231543).

The spelling of 31311001220230 in words is "thirty-one trillion, three hundred eleven billion, one million, two hundred twenty thousand, two hundred thirty".