1221400202302 has 8 divisors (see below), whose sum is σ = 2093828918256. Its totient is φ = 523457229552.

The previous prime is 1221400202263. The next prime is 1221400202371. The reversal of 1221400202302 is 2032020041221.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1221400202302.

It is a congruent 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, 43621435783 + ... + 43621435810.

It is an arithmetic number, because the mean of its divisors is an integer number (261728614782).

Almost surely, 2^{1221400202302} is an apocalyptic number.

1221400202302 is a deficient number, since it is larger than the sum of its proper divisors (872428715954).

1221400202302 is an equidigital number, since it uses as much as digits as its factorization.

1221400202302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87242871602.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 1221400202302 its reverse (2032020041221), we get a palindrome (3253420243523).

The spelling of 1221400202302 in words is "one trillion, two hundred twenty-one billion, four hundred million, two hundred two thousand, three hundred two".