1201210210100 has 18 divisors (see below), whose sum is σ = 2606626156134. Its totient is φ = 480484084000.

The previous prime is 1201210210099. The next prime is 1201210210117. The reversal of 1201210210100 is 10120121021.

It can be written as a sum of positive squares in 3 ways, for example, as 407610741136 + 793599468964 = 638444^2 + 890842^2 .

It is a super-2 number, since 2×1201210210100² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6006050951 + ... + 6006051150.

Almost surely, 2^{1201210210100} is an apocalyptic number.

1201210210100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201210210100 is an abundant number, since it is smaller than the sum of its proper divisors (1405415946034).

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

1201210210100 is a wasteful number, since it uses less digits than its factorization.

1201210210100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12012102115 (or 12012102108 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1201210210100 its reverse (10120121021), we get a palindrome (1211330331121).

The spelling of 1201210210100 in words is "one trillion, two hundred one billion, two hundred ten million, two hundred ten thousand, one hundred".