31220134133101 has 4 divisors (see below), whose sum is σ = 31221546255900. Its totient is φ = 31218722010304.

The previous prime is 31220134133099. The next prime is 31220134133107. The reversal of 31220134133101 is 10133143102213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5501299885225 + 25718834247876 = 2345485^2 + 5071374^2 .

It is a cyclic number.

It is not a de Polignac number, because 31220134133101 - 2¹ = 31220134133099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31220134133107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 706028236 + ... + 706072453.

It is an arithmetic number, because the mean of its divisors is an integer number (7805386563975).

Almost surely, 2^{31220134133101} is an apocalyptic number.

It is an amenable number.

31220134133101 is a deficient number, since it is larger than the sum of its proper divisors (1412122799).

31220134133101 is a wasteful number, since it uses less digits than its factorization.

31220134133101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1412122798.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 31220134133101 its reverse (10133143102213), we get a palindrome (41353277235314).

The spelling of 31220134133101 in words is "thirty-one trillion, two hundred twenty billion, one hundred thirty-four million, one hundred thirty-three thousand, one hundred one".