21225055146204 has 96 divisors (see below), whose sum is σ = 60970485735936. Its totient is φ = 5596303161600.

The previous prime is 21225055146173. The next prime is 21225055146227. The reversal of 21225055146204 is 40264155052212.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1415599 + ... + 6667385.

It is an arithmetic number, because the mean of its divisors is an integer number (635109226416).

Almost surely, 2^{21225055146204} is an apocalyptic number.

It is an amenable number.

21225055146204 is an abundant number, since it is smaller than the sum of its proper divisors (39745430589732).

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

21225055146204 is a wasteful number, since it uses less digits than its factorization.

21225055146204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5255515 (or 5255513 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 39.

The spelling of 21225055146204 in words is "twenty-one trillion, two hundred twenty-five billion, fifty-five million, one hundred forty-six thousand, two hundred four".