2312120100220 has 72 divisors (see below), whose sum is σ = 5604577144992. Its totient is φ = 784877625600.

The previous prime is 2312120100211. The next prime is 2312120100293. The reversal of 2312120100220 is 220010212132.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2312120100194 and 2312120100203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 618654 + ... + 2237626.

It is an arithmetic number, because the mean of its divisors is an integer number (77841349236).

Almost surely, 2^{2312120100220} is an apocalyptic number.

2312120100220 is a gapful number since it is divisible by the number (20) 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 2312120100220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2802288572496).

2312120100220 is an abundant number, since it is smaller than the sum of its proper divisors (3292457044772).

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

2312120100220 is a wasteful number, since it uses less digits than its factorization.

2312120100220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1619191 (or 1619088 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 2312120100220 its reverse (220010212132), we get a palindrome (2532130312352).

The spelling of 2312120100220 in words is "two trillion, three hundred twelve billion, one hundred twenty million, one hundred thousand, two hundred twenty".