221127354465 has 32 divisors (see below), whose sum is σ = 356328999936. Its totient is φ = 117094461120.

The previous prime is 221127354449. The next prime is 221127354467. The reversal of 221127354465 is 564453721122.

It is a happy number.

It is not a de Polignac number, because 221127354465 - 2⁴ = 221127354449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221127354467) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2161930 + ... + 2261900.

It is an arithmetic number, because the mean of its divisors is an integer number (11135281248).

Almost surely, 2^221127354465 is an apocalyptic number.

It is an amenable number.

221127354465 is a deficient number, since it is larger than the sum of its proper divisors (135201645471).

221127354465 is a wasteful number, since it uses less digits than its factorization.

221127354465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101029.

The product of its digits is 403200, while the sum is 42.

The spelling of 221127354465 in words is "two hundred twenty-one billion, one hundred twenty-seven million, three hundred fifty-four thousand, four hundred sixty-five".