1002154345521 has 16 divisors (see below), whose sum is σ = 1555905400704.
Its totient is φ = 561854726784.
The previous prime is 1002154345499. The next prime is 1002154345529. The reversal of 1002154345521 is 1255434512001.
It is not a de Polignac number, because 1002154345521 - 210 = 1002154344497 is a prime.
It is a super-2 number, since 2×10021543455212 (a number of 25 digits) contains 22 as substring.
It is not an unprimeable number, because it can be changed into a prime (1002154345529) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 450202996 + ... + 450205221.
It is an arithmetic number, because the mean of its divisors is an integer number (97244087544).
Almost surely, 21002154345521 is an apocalyptic number.
It is an amenable number.
1002154345521 is a deficient number, since it is larger than the sum of its proper divisors (553751055183).
1002154345521 is an equidigital number, since it uses as much as digits as its factorization.
1002154345521 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 900408280.
The product of its (nonzero) digits is 24000, while the sum is 33.
Adding to 1002154345521 its reverse (1255434512001), we get a palindrome (2257588857522).
The spelling of 1002154345521 in words is "one trillion, two billion, one hundred fifty-four million, three hundred forty-five thousand, five hundred twenty-one".