221221214302 has 16 divisors (see below), whose sum is σ = 383292371952. Its totient is φ = 94640091520.

The previous prime is 221221214281. The next prime is 221221214311. The reversal of 221221214302 is 203412122122.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 295749913 + ... + 295750660.

It is an arithmetic number, because the mean of its divisors is an integer number (23955773247).

Almost surely, 2^221221214302 is an apocalyptic number.

221221214302 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221221214302 is a deficient number, since it is larger than the sum of its proper divisors (162071157650).

221221214302 is a wasteful number, since it uses less digits than its factorization.

221221214302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591500603.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 221221214302 its reverse (203412122122), we get a palindrome (424633336424).

The spelling of 221221214302 in words is "two hundred twenty-one billion, two hundred twenty-one million, two hundred fourteen thousand, three hundred two".