1221231023124 has 96 divisors (see below), whose sum is σ = 3333293838336. Its totient is φ = 340712265600.

The previous prime is 1221231023113. The next prime is 1221231023137. The reversal of 1221231023124 is 4213201321221.

It is a junction number, because it is equal to n+sod(n) for n = 1221231023094 and 1221231023103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13235349 + ... + 13327299.

It is an arithmetic number, because the mean of its divisors is an integer number (34721810816).

Almost surely, 2^{1221231023124} is an apocalyptic number.

1221231023124 is a gapful number since it is divisible by the number (14) 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 1221231023124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1666646919168).

1221231023124 is an abundant number, since it is smaller than the sum of its proper divisors (2112062815212).

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

1221231023124 is a wasteful number, since it uses less digits than its factorization.

1221231023124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95685 (or 95683 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 1221231023124 its reverse (4213201321221), we get a palindrome (5434432344345).

The spelling of 1221231023124 in words is "one trillion, two hundred twenty-one billion, two hundred thirty-one million, twenty-three thousand, one hundred twenty-four".