31220424202043 has 4 divisors (see below), whose sum is σ = 31392912733728. Its totient is φ = 31047935670360.

The previous prime is 31220424202031. The next prime is 31220424202063. The reversal of 31220424202043 is 34020242402213.

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

It is a cyclic number.

It is not a de Polignac number, because 31220424202043 - 2⁴ = 31220424202027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31220424201997 and 31220424202015.

It is not an unprimeable number, because it can be changed into a prime (31220424202063) 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 3 ways as a sum of consecutive naturals, for example, 86244265571 + ... + 86244265932.

It is an arithmetic number, because the mean of its divisors is an integer number (7848228183432).

Almost surely, 2^{31220424202043} is an apocalyptic number.

31220424202043 is a deficient number, since it is larger than the sum of its proper divisors (172488531685).

31220424202043 is a wasteful number, since it uses less digits than its factorization.

31220424202043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172488531684.

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 31220424202043 its reverse (34020242402213), we get a palindrome (65240666604256).

The spelling of 31220424202043 in words is "thirty-one trillion, two hundred twenty billion, four hundred twenty-four million, two hundred two thousand, forty-three".