1021201553104 has 80 divisors (see below), whose sum is σ = 2100411596800. Its totient is φ = 480211079040.

The previous prime is 1021201553051. The next prime is 1021201553129. The reversal of 1021201553104 is 4013551021201.

1021201553104 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1021201553104² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4123969 + ... + 4364575.

It is an arithmetic number, because the mean of its divisors is an integer number (26255144960).

Almost surely, 2^{1021201553104} 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 1021201553104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1050205798400).

1021201553104 is an abundant number, since it is smaller than the sum of its proper divisors (1079210043696).

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

1021201553104 is a wasteful number, since it uses less digits than its factorization.

1021201553104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240888 (or 240882 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 1021201553104 its reverse (4013551021201), we get a palindrome (5034752574305).

The spelling of 1021201553104 in words is "one trillion, twenty-one billion, two hundred one million, five hundred fifty-three thousand, one hundred four".