1221431411514 has 32 divisors (see below), whose sum is σ = 2453626797120. Its totient is φ = 405352950912.

The previous prime is 1221431411513. The next prime is 1221431411591. The reversal of 1221431411514 is 4151141341221.

It is not an unprimeable number, because it can be changed into a prime (1221431411513) 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, 1164589 + ... + 1949135.

It is an arithmetic number, because the mean of its divisors is an integer number (76675837410).

Almost surely, 2^{1221431411514} is an apocalyptic number.

1221431411514 is an abundant number, since it is smaller than the sum of its proper divisors (1232195385606).

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

1221431411514 is a wasteful number, since it uses less digits than its factorization.

1221431411514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785694.

The product of its digits is 3840, while the sum is 30.

Adding to 1221431411514 its reverse (4151141341221), we get a palindrome (5372572752735).

The spelling of 1221431411514 in words is "one trillion, two hundred twenty-one billion, four hundred thirty-one million, four hundred eleven thousand, five hundred fourteen".