1221401440014 has 32 divisors (see below), whose sum is σ = 2791966060800. Its totient is φ = 348947922432.

The previous prime is 1221401439989. The next prime is 1221401440019. The reversal of 1221401440014 is 4100441041221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221401440019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 371859 + ... + 1606574.

It is an arithmetic number, because the mean of its divisors is an integer number (87248939400).

Almost surely, 2^{1221401440014} is an apocalyptic number.

1221401440014 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1221401440014 is an abundant number, since it is smaller than the sum of its proper divisors (1570564620786).

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

1221401440014 is a wasteful number, since it uses less digits than its factorization.

1221401440014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993144.

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

Adding to 1221401440014 its reverse (4100441041221), we get a palindrome (5321842481235).

The spelling of 1221401440014 in words is "one trillion, two hundred twenty-one billion, four hundred one million, four hundred forty thousand, fourteen".