153221421204 has 108 divisors (see below), whose sum is σ = 413058300564. Its totient is φ = 49693118976.

The previous prime is 153221421187. The next prime is 153221421293. The reversal of 153221421204 is 402124122351.

153221421204 is a `hidden beast` number, since 1 + 5 + 32 + 2 + 1 + 421 + 204 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 110290410000 + 42931011204 = 332100^2 + 207198^2 .

It is a tau number, because it is divible by the number of its divisors (108).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 892132 + ... + 1049924.

Almost surely, 2^153221421204 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 153221421204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206529150282).

153221421204 is an abundant number, since it is smaller than the sum of its proper divisors (259836879360).

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

153221421204 is an equidigital number, since it uses as much as digits as its factorization.

153221421204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157858 (or 157835 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 153221421204 its reverse (402124122351), we get a palindrome (555345543555).

The spelling of 153221421204 in words is "one hundred fifty-three billion, two hundred twenty-one million, four hundred twenty-one thousand, two hundred four".