1231221101334 has 256 divisors, whose sum is σ = 3035588935680. Its totient is φ = 325459814400.

The previous prime is 1231221101329. The next prime is 1231221101353. The reversal of 1231221101334 is 4331011221321.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1015020912 + ... + 1015022124.

It is an arithmetic number, because the mean of its divisors is an integer number (11857769280).

Almost surely, 2^{1231221101334} is an apocalyptic number.

1231221101334 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231221101334, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1517794467840).

1231221101334 is an abundant number, since it is smaller than the sum of its proper divisors (1804367834346).

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

1231221101334 is a wasteful number, since it uses less digits than its factorization.

1231221101334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1615.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 1231221101334 its reverse (4331011221321), we get a palindrome (5562232322655).

The spelling of 1231221101334 in words is "one trillion, two hundred thirty-one billion, two hundred twenty-one million, one hundred one thousand, three hundred thirty-four".