1213421144040 has 96 divisors (see below), whose sum is σ = 4506992830080. Its totient is φ = 277353403776.

The previous prime is 1213421144017. The next prime is 1213421144057. The reversal of 1213421144040 is 404411243121.

1213421144040 is a `hidden beast` number, since 1 + 2 + 1 + 3 + 4 + 211 + 440 + 4 + 0 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1213421143995 and 1213421144013.

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, 240755644 + ... + 240760683.

It is an arithmetic number, because the mean of its divisors is an integer number (46947841980).

Almost surely, 2^{1213421144040} is an apocalyptic number.

1213421144040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213421144040 is an abundant number, since it is smaller than the sum of its proper divisors (3293571686040).

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

1213421144040 is a wasteful number, since it uses less digits than its factorization.

1213421144040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481516351 (or 481516344 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

Adding to 1213421144040 its reverse (404411243121), we get a palindrome (1617832387161).

The spelling of 1213421144040 in words is "one trillion, two hundred thirteen billion, four hundred twenty-one million, one hundred forty-four thousand, forty".