1211454223434 has 384 divisors, whose sum is σ = 3484130734080. Its totient is φ = 304937208576.

The previous prime is 1211454223409. The next prime is 1211454223451. The reversal of 1211454223434 is 4343224541121.

1211454223434 is a `hidden beast` number, since 1 + 21 + 145 + 42 + 23 + 434 = 666.

It is a super-3 number, since 3×1211454223434³ (a number of 37 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1215099024 + ... + 1215100020.

It is an arithmetic number, because the mean of its divisors is an integer number (9073257120).

Almost surely, 2^{1211454223434} is an apocalyptic number.

1211454223434 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 1211454223434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1742065367040).

1211454223434 is an abundant number, since it is smaller than the sum of its proper divisors (2272676510646).

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

1211454223434 is a wasteful number, since it uses less digits than its factorization.

1211454223434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1891 (or 1872 counting only the distinct ones).

The product of its digits is 92160, while the sum is 36.

Adding to 1211454223434 its reverse (4343224541121), we get a palindrome (5554678764555).

The spelling of 1211454223434 in words is "one trillion, two hundred eleven billion, four hundred fifty-four million, two hundred twenty-three thousand, four hundred thirty-four".