1030311212220 has 108 divisors (see below), whose sum is σ = 3143463389976. Its totient is φ = 273160080000.

The previous prime is 1030311212213. The next prime is 1030311212221. The reversal of 1030311212220 is 222121130301.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1030311212193 and 1030311212202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1030311212221) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5291595 + ... + 5482845.

Almost surely, 2^{1030311212220} is an apocalyptic number.

1030311212220 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 1030311212220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1571731694988).

1030311212220 is an abundant number, since it is smaller than the sum of its proper divisors (2113152177756).

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

1030311212220 is a wasteful number, since it uses less digits than its factorization.

1030311212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191612 (or 191434 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1030311212220 its reverse (222121130301), we get a palindrome (1252432342521).

The spelling of 1030311212220 in words is "one trillion, thirty billion, three hundred eleven million, two hundred twelve thousand, two hundred twenty".