1211403242100 has 72 divisors (see below), whose sum is σ = 3505140462208. Its totient is φ = 323027308800.

The previous prime is 1211403242059. The next prime is 1211403242107. The reversal of 1211403242100 is 12423041121.

It is a super-3 number, since 3×1211403242100³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211403242107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8535720 + ... + 8676480.

Almost surely, 2^{1211403242100} is an apocalyptic number.

1211403242100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211403242100 is an abundant number, since it is smaller than the sum of its proper divisors (2293737220108).

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

1211403242100 is a wasteful number, since it uses less digits than its factorization.

1211403242100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169465 (or 169458 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 1211403242100 its reverse (12423041121), we get a palindrome (1223826283221).

The spelling of 1211403242100 in words is "one trillion, two hundred eleven billion, four hundred three million, two hundred forty-two thousand, one hundred".