31122321102121 has 16 divisors (see below), whose sum is σ = 32991771545280. Its totient is φ = 29257178227200.

The previous prime is 31122321102017. The next prime is 31122321102163. The reversal of 31122321102121 is 12120112322113.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 31122321102121 - 2⁴³ = 22326228079913 is a prime.

It is a super-2 number, since 2×31122321102121² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31122321102092 and 31122321102101.

It is not an unprimeable number, because it can be changed into a prime (31122321102221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 237402490 + ... + 237533548.

It is an arithmetic number, because the mean of its divisors is an integer number (2061985721580).

Almost surely, 2^{31122321102121} is an apocalyptic number.

It is an amenable number.

31122321102121 is a deficient number, since it is larger than the sum of its proper divisors (1869450443159).

31122321102121 is a wasteful number, since it uses less digits than its factorization.

31122321102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147384.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 31122321102121 its reverse (12120112322113), we get a palindrome (43242433424234).

The spelling of 31122321102121 in words is "thirty-one trillion, one hundred twenty-two billion, three hundred twenty-one million, one hundred two thousand, one hundred twenty-one".