1231443020220 has 48 divisors (see below), whose sum is σ = 3940617666048. Its totient is φ = 281472690240.

The previous prime is 1231443020201. The next prime is 1231443020221. The reversal of 1231443020220 is 220203441321.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231443020221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1466003176 + ... + 1466004015.

It is an arithmetic number, because the mean of its divisors is an integer number (82096201376).

Almost surely, 2^{1231443020220} is an apocalyptic number.

1231443020220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231443020220 is an abundant number, since it is smaller than the sum of its proper divisors (2709174645828).

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

1231443020220 is a wasteful number, since it uses less digits than its factorization.

1231443020220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2932007210 (or 2932007208 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 1231443020220 its reverse (220203441321), we get a palindrome (1451646461541).

The spelling of 1231443020220 in words is "one trillion, two hundred thirty-one billion, four hundred forty-three million, twenty thousand, two hundred twenty".