121201110100 has 36 divisors (see below), whose sum is σ = 300578754784. Its totient is φ = 41554666080.

The previous prime is 121201110089. The next prime is 121201110259. The reversal of 121201110100 is 1011102121.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

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, 86571522 + ... + 86572921.

Almost surely, 2^121201110100 is an apocalyptic number.

121201110100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121201110100 is an abundant number, since it is smaller than the sum of its proper divisors (179377644684).

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

121201110100 is a wasteful number, since it uses less digits than its factorization.

121201110100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173144464 (or 173144457 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 121201110100 its reverse (1011102121), we get a palindrome (122212212221).

The spelling of 121201110100 in words is "one hundred twenty-one billion, two hundred one million, one hundred ten thousand, one hundred".