31020220020220 has 48 divisors (see below), whose sum is σ = 66082206697920. Its totient is φ = 12229968633344.

The previous prime is 31020220020203. The next prime is 31020220020253. The reversal of 31020220020220 is 2202002202013.

It is a junction number, because it is equal to n+sod(n) for n = 31020220020194 and 31020220020203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26923264 + ... + 28051783.

It is an arithmetic number, because the mean of its divisors is an integer number (1376712639540).

Almost surely, 2^{31020220020220} is an apocalyptic number.

It is an amenable number.

31020220020220 is an abundant number, since it is smaller than the sum of its proper divisors (35061986677700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31020220020220 is a wasteful number, since it uses less digits than its factorization.

31020220020220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54975462 (or 54975460 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 31020220020220 its reverse (2202002202013), we get a palindrome (33222222222233).

The spelling of 31020220020220 in words is "thirty-one trillion, twenty billion, two hundred twenty million, twenty thousand, two hundred twenty".