1211224210100 has 144 divisors (see below), whose sum is σ = 2698233968640. Its totient is φ = 471786940800.

The previous prime is 1211224210061. The next prime is 1211224210123. The reversal of 1211224210100 is 10124221121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 277610519 + ... + 277614881.

Almost surely, 2^{1211224210100} is an apocalyptic number.

1211224210100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211224210100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1349116984320).

1211224210100 is an abundant number, since it is smaller than the sum of its proper divisors (1487009758540).

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

1211224210100 is a wasteful number, since it uses less digits than its factorization.

1211224210100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4870 (or 4863 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1211224210100 its reverse (10124221121), we get a palindrome (1221348431221).

The spelling of 1211224210100 in words is "one trillion, two hundred eleven billion, two hundred twenty-four million, two hundred ten thousand, one hundred".