123031121030220 has 192 divisors, whose sum is σ = 372621150720000. Its totient is φ = 30151170545664.

The previous prime is 123031121030179. The next prime is 123031121030231. The reversal of 123031121030220 is 22030121130321.

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, 866595601 + ... + 866737559.

It is an arithmetic number, because the mean of its divisors is an integer number (1940735160000).

Almost surely, 2^{123031121030220} is an apocalyptic number.

123031121030220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123031121030220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186310575360000).

123031121030220 is an abundant number, since it is smaller than the sum of its proper divisors (249590029689780).

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

123031121030220 is a wasteful number, since it uses less digits than its factorization.

123031121030220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146872 (or 146870 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 123031121030220 its reverse (22030121130321), we get a palindrome (145061242160541).

The spelling of 123031121030220 in words is "one hundred twenty-three trillion, thirty-one billion, one hundred twenty-one million, thirty thousand, two hundred twenty".