221220134149 has 8 divisors (see below), whose sum is σ = 256596488768. Its totient is φ = 186787149120.

The previous prime is 221220134089. The next prime is 221220134153. The reversal of 221220134149 is 941431022122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221220134149 - 2⁷ = 221220134021 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221220134149.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221220134159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235841892 + ... + 235842829.

It is an arithmetic number, because the mean of its divisors is an integer number (32074561096).

Almost surely, 2^221220134149 is an apocalyptic number.

It is an amenable number.

221220134149 is a deficient number, since it is larger than the sum of its proper divisors (35376354619).

221220134149 is an equidigital number, since it uses as much as digits as its factorization.

221220134149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471684795.

The product of its (nonzero) digits is 6912, while the sum is 31.

The spelling of 221220134149 in words is "two hundred twenty-one billion, two hundred twenty million, one hundred thirty-four thousand, one hundred forty-nine".