221404220029 has 4 divisors (see below), whose sum is σ = 221406012000. Its totient is φ = 221402428060.

The previous prime is 221404219987. The next prime is 221404220039. The reversal of 221404220029 is 920022404122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 920022404122 = 2 ⋅460011202061.

It is a cyclic number.

It is not a de Polignac number, because 221404220029 - 2¹⁹ = 221403695741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221404219979 and 221404220006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221404220039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 695737 + ... + 962734.

It is an arithmetic number, because the mean of its divisors is an integer number (55351503000).

Almost surely, 2^221404220029 is an apocalyptic number.

It is an amenable number.

221404220029 is a deficient number, since it is larger than the sum of its proper divisors (1791971).

221404220029 is a wasteful number, since it uses less digits than its factorization.

221404220029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1791970.

The product of its (nonzero) digits is 4608, while the sum is 28.

The spelling of 221404220029 in words is "two hundred twenty-one billion, four hundred four million, two hundred twenty thousand, twenty-nine".