1221253320414 has 16 divisors (see below), whose sum is σ = 2443814915328. Its totient is φ = 406866394392.

The previous prime is 1221253320401. The next prime is 1221253320437. The reversal of 1221253320414 is 4140233521221.

It is a happy number.

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 in 7 ways as a sum of consecutive naturals, for example, 54499302 + ... + 54521705.

It is an arithmetic number, because the mean of its divisors is an integer number (152738432208).

Almost surely, 2^{1221253320414} is an apocalyptic number.

1221253320414 is an abundant number, since it is smaller than the sum of its proper divisors (1222561594914).

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

1221253320414 is a wasteful number, since it uses less digits than its factorization.

1221253320414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109022879.

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 1221253320414 its reverse (4140233521221), we get a palindrome (5361486841635).

The spelling of 1221253320414 in words is "one trillion, two hundred twenty-one billion, two hundred fifty-three million, three hundred twenty thousand, four hundred fourteen".