1040213451221 has 4 divisors (see below), whose sum is σ = 1188815372832. Its totient is φ = 891611529612.

The previous prime is 1040213451143. The next prime is 1040213451227. The reversal of 1040213451221 is 1221543120401.

It is a happy number.

1040213451221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1040213451221 - 2¹⁴ = 1040213434837 is a prime.

It is a super-2 number, since 2×1040213451221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1040213451227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74300960795 + ... + 74300960808.

It is an arithmetic number, because the mean of its divisors is an integer number (297203843208).

Almost surely, 2^{1040213451221} is an apocalyptic number.

It is an amenable number.

1040213451221 is a deficient number, since it is larger than the sum of its proper divisors (148601921611).

1040213451221 is an equidigital number, since it uses as much as digits as its factorization.

1040213451221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148601921610.

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 1040213451221 its reverse (1221543120401), we get a palindrome (2261756571622).

The spelling of 1040213451221 in words is "one trillion, forty billion, two hundred thirteen million, four hundred fifty-one thousand, two hundred twenty-one".