221230312402 has 8 divisors (see below), whose sum is σ = 362013238512. Its totient is φ = 100559232900.

The previous prime is 221230312399. The next prime is 221230312469. The reversal of 221230312402 is 204213032122.

221230312402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×221230312402² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 10055923291 = 221230312402 / (2 + 2 + 1 + 2 + 3 + 0 + 3 + 1 + 2 + 4 + 0 + 2).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5027961624 + ... + 5027961667.

It is an arithmetic number, because the mean of its divisors is an integer number (45251654814).

Almost surely, 2^221230312402 is an apocalyptic number.

221230312402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221230312402 is a deficient number, since it is larger than the sum of its proper divisors (140782926110).

221230312402 is a wasteful number, since it uses less digits than its factorization.

221230312402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10055923304.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 221230312402 its reverse (204213032122), we get a palindrome (425443344524).

The spelling of 221230312402 in words is "two hundred twenty-one billion, two hundred thirty million, three hundred twelve thousand, four hundred two".