1221353516214 has 24 divisors (see below), whose sum is σ = 2849824871712. Its totient is φ = 375801081840.

The previous prime is 1221353516183. The next prime is 1221353516219. The reversal of 1221353516214 is 4126153531221.

1221353516214 is a `hidden beast` number, since 1 + 2 + 2 + 135 + 3 + 516 + 2 + 1 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221353516219) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2609729502 + ... + 2609729969.

It is an arithmetic number, because the mean of its divisors is an integer number (118742702988).

Almost surely, 2^{1221353516214} is an apocalyptic number.

1221353516214 is an abundant number, since it is smaller than the sum of its proper divisors (1628471355498).

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

1221353516214 is a wasteful number, since it uses less digits than its factorization.

1221353516214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5219459492 (or 5219459489 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The spelling of 1221353516214 in words is "one trillion, two hundred twenty-one billion, three hundred fifty-three million, five hundred sixteen thousand, two hundred fourteen".