31213110021122 has 8 divisors (see below), whose sum is σ = 46819728302076. Its totient is φ = 15606533920432.

The previous prime is 31213110021109. The next prime is 31213110021131. The reversal of 31213110021122 is 22112001131213.

It can be written as a sum of positive squares in 2 ways, for example, as 19030699531561 + 12182410489561 = 4362419^2 + 3490331^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×31213110021122² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31213110021094 and 31213110021103.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8625173 + ... + 11697000.

Almost surely, 2^{31213110021122} is an apocalyptic number.

31213110021122 is a deficient number, since it is larger than the sum of its proper divisors (15606618280954).

31213110021122 is a wasteful number, since it uses less digits than its factorization.

31213110021122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21090132.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 31213110021122 its reverse (22112001131213), we get a palindrome (53325111152335).

The spelling of 31213110021122 in words is "thirty-one trillion, two hundred thirteen billion, one hundred ten million, twenty-one thousand, one hundred twenty-two".