221421207126153 has 16 divisors (see below), whose sum is σ = 299152990403136. Its totient is φ = 145663290393600.

The previous prime is 221421207126151. The next prime is 221421207126263. The reversal of 221421207126153 is 351621702124122.

It is not a de Polignac number, because 221421207126153 - 2¹ = 221421207126151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221421207126151) 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, 1438601248 + ... + 1438755153.

It is an arithmetic number, because the mean of its divisors is an integer number (18697061900196).

Almost surely, 2^{221421207126153} is an apocalyptic number.

It is an amenable number.

221421207126153 is a deficient number, since it is larger than the sum of its proper divisors (77731783276983).

221421207126153 is a wasteful number, since it uses less digits than its factorization.

221421207126153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2877356744.

The product of its (nonzero) digits is 80640, while the sum is 39.

The spelling of 221421207126153 in words is "two hundred twenty-one trillion, four hundred twenty-one billion, two hundred seven million, one hundred twenty-six thousand, one hundred fifty-three".