31030020120220 has 192 divisors, whose sum is σ = 73557430442496. Its totient is φ = 10898360478720.

The previous prime is 31030020120161. The next prime is 31030020120233. The reversal of 31030020120220 is 2202102003013.

It is a super-2 number, since 2×31030020120220² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31030020120194 and 31030020120203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1271032734 + ... + 1271057146.

It is an arithmetic number, because the mean of its divisors is an integer number (383111616888).

Almost surely, 2^{31030020120220} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31030020120220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36778715221248).

31030020120220 is an abundant number, since it is smaller than the sum of its proper divisors (42527410322276).

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

31030020120220 is a wasteful number, since it uses less digits than its factorization.

31030020120220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26180 (or 26178 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 31030020120220 its reverse (2202102003013), we get a palindrome (33232122123233).

The spelling of 31030020120220 in words is "thirty-one trillion, thirty billion, twenty million, one hundred twenty thousand, two hundred twenty".