221421251705414 has 4 divisors (see below), whose sum is σ = 332131877558124. Its totient is φ = 110710625852706.

The previous prime is 221421251705371. The next prime is 221421251705509. The reversal of 221421251705414 is 414507152124122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×221421251705414² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55355312926352 + ... + 55355312926355.

It is an arithmetic number, because the mean of its divisors is an integer number (83032969389531).

Almost surely, 2^{221421251705414} is an apocalyptic number.

221421251705414 is a deficient number, since it is larger than the sum of its proper divisors (110710625852710).

221421251705414 is a wasteful number, since it uses less digits than its factorization.

221421251705414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110710625852709.

The product of its (nonzero) digits is 179200, while the sum is 41.

The spelling of 221421251705414 in words is "two hundred twenty-one trillion, four hundred twenty-one billion, two hundred fifty-one million, seven hundred five thousand, four hundred fourteen".