31220134133102 has 4 divisors (see below), whose sum is σ = 46830201199656. Its totient is φ = 15610067066550.

The previous prime is 31220134133099. The next prime is 31220134133107. The reversal of 31220134133102 is 20133143102213.

It is a happy number.

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

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 as a sum of consecutive naturals, namely, 7805033533274 + ... + 7805033533277.

It is an arithmetic number, because the mean of its divisors is an integer number (11707550299914).

Almost surely, 2^{31220134133102} is an apocalyptic number.

31220134133102 is a deficient number, since it is larger than the sum of its proper divisors (15610067066554).

31220134133102 is a wasteful number, since it uses less digits than its factorization.

31220134133102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15610067066553.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 31220134133102 its reverse (20133143102213), we get a palindrome (51353277235315).

The spelling of 31220134133102 in words is "thirty-one trillion, two hundred twenty billion, one hundred thirty-four million, one hundred thirty-three thousand, one hundred two".