1053661147221 has 32 divisors (see below), whose sum is σ = 1491692025600. Its totient is φ = 660132633600.

The previous prime is 1053661147139. The next prime is 1053661147247. The reversal of 1053661147221 is 1227411663501.

It is not a de Polignac number, because 1053661147221 - 2⁹ = 1053661146709 is a prime.

It is a super-2 number, since 2×1053661147221² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1053661147221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1053661147291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3566055 + ... + 3850203.

It is an arithmetic number, because the mean of its divisors is an integer number (46615375800).

Almost surely, 2^{1053661147221} is an apocalyptic number.

It is an amenable number.

1053661147221 is a deficient number, since it is larger than the sum of its proper divisors (438030878379).

1053661147221 is a wasteful number, since it uses less digits than its factorization.

1053661147221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285117.

The product of its (nonzero) digits is 60480, while the sum is 39.

The spelling of 1053661147221 in words is "one trillion, fifty-three billion, six hundred sixty-one million, one hundred forty-seven thousand, two hundred twenty-one".