31123221100230 has 32 divisors (see below), whose sum is σ = 85366549304064. Its totient is φ = 7113879108576.

The previous prime is 31123221100229. The next prime is 31123221100249. The reversal of 31123221100230 is 3200112232113.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31123221100197 and 31123221100206.

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, 74102907172 + ... + 74102907591.

It is an arithmetic number, because the mean of its divisors is an integer number (2667704665752).

Almost surely, 2^{31123221100230} is an apocalyptic number.

31123221100230 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31123221100230 is an abundant number, since it is smaller than the sum of its proper divisors (54243328203834).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31123221100230 is a wasteful number, since it uses less digits than its factorization.

31123221100230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148205814780.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 31123221100230 its reverse (3200112232113), we get a palindrome (34323333332343).

The spelling of 31123221100230 in words is "thirty-one trillion, one hundred twenty-three billion, two hundred twenty-one million, one hundred thousand, two hundred thirty".