1011221232100 has 36 divisors (see below), whose sum is σ = 2200139998000. Its totient is φ = 403421225760.

The previous prime is 1011221232089. The next prime is 1011221232209. The reversal of 1011221232100 is 12321221101.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13302750 + ... + 13378549.

Almost surely, 2^{1011221232100} is an apocalyptic number.

1011221232100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011221232100 is an abundant number, since it is smaller than the sum of its proper divisors (1188918765900).

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

1011221232100 is a wasteful number, since it uses less digits than its factorization.

1011221232100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26681692 (or 26681685 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1011221232100 its reverse (12321221101), we get a palindrome (1023542453201).

The spelling of 1011221232100 in words is "one trillion, eleven billion, two hundred twenty-one million, two hundred thirty-two thousand, one hundred".