221212241010402 has 8 divisors (see below), whose sum is σ = 442424482020816. Its totient is φ = 73737413670132.

The previous prime is 221212241010379. The next prime is 221212241010461. The reversal of 221212241010402 is 204010142212122.

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

221212241010402 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18434353417528 + ... + 18434353417539.

It is an arithmetic number, because the mean of its divisors is an integer number (55303060252602).

Almost surely, 2^{221212241010402} is an apocalyptic number.

221212241010402 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221212241010402 is a wasteful number, since it uses less digits than its factorization.

221212241010402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36868706835072.

The product of its (nonzero) digits is 1024, while the sum is 24.

Adding to 221212241010402 its reverse (204010142212122), we get a palindrome (425222383222524).

The spelling of 221212241010402 in words is "two hundred twenty-one trillion, two hundred twelve billion, two hundred forty-one million, ten thousand, four hundred two".