10121201100 has 90 divisors (see below), whose sum is σ = 32808961724. Its totient is φ = 2698984800.

The previous prime is 10121201099. The next prime is 10121201131. The reversal of 10121201100 is 110212101.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (90).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 616666 + ... + 632865.

Almost surely, 2^10121201100 is an apocalyptic number.

10121201100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10121201100 is an abundant number, since it is smaller than the sum of its proper divisors (22687760624).

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

10121201100 is a wasteful number, since it uses less digits than its factorization.

10121201100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249557 (or 1249541 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 10121201100 its reverse (110212101), we get a palindrome (10231413201).

The spelling of 10121201100 in words is "ten billion, one hundred twenty-one million, two hundred one thousand, one hundred".