1221203141124 has 24 divisors (see below), whose sum is σ = 2849960335488. Its totient is φ = 406998236640.

The previous prime is 1221203141087. The next prime is 1221203141129. The reversal of 1221203141124 is 4211413021221.

It is a super-2 number, since 2×1221203141124² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221203141094 and 1221203141103.

It is not an unprimeable number, because it can be changed into a prime (1221203141129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8611372 + ... + 8752035.

It is an arithmetic number, because the mean of its divisors is an integer number (118748347312).

Almost surely, 2^{1221203141124} is an apocalyptic number.

It is an amenable number.

1221203141124 is an abundant number, since it is smaller than the sum of its proper divisors (1628757194364).

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

1221203141124 is a wasteful number, since it uses less digits than its factorization.

1221203141124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17369275 (or 17369273 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 1221203141124 its reverse (4211413021221), we get a palindrome (5432616162345).

The spelling of 1221203141124 in words is "one trillion, two hundred twenty-one billion, two hundred three million, one hundred forty-one thousand, one hundred twenty-four".