1221102210174 has 256 divisors, whose sum is σ = 3168904273920. Its totient is φ = 304517283840.

The previous prime is 1221102210173. The next prime is 1221102210233. The reversal of 1221102210174 is 4710122011221.

It is a happy number.

It is a super-2 number, since 2×1221102210174² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221102210173) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1023555322 + ... + 1023556514.

It is an arithmetic number, because the mean of its divisors is an integer number (12378532320).

Almost surely, 2^{1221102210174} is an apocalyptic number.

1221102210174 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 1221102210174, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1584452136960).

1221102210174 is an abundant number, since it is smaller than the sum of its proper divisors (1947802063746).

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

1221102210174 is a wasteful number, since it uses less digits than its factorization.

1221102210174 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2095.

The product of its (nonzero) digits is 448, while the sum is 24.

Adding to 1221102210174 its reverse (4710122011221), we get a palindrome (5931224221395).

The spelling of 1221102210174 in words is "one trillion, two hundred twenty-one billion, one hundred two million, two hundred ten thousand, one hundred seventy-four".