10203112121100 has 144 divisors (see below), whose sum is σ = 29879924979072. Its totient is φ = 2687756797440.

The previous prime is 10203112121057. The next prime is 10203112121101. The reversal of 10203112121100 is 112121130201.

10203112121100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 10203112121100.

It is not an unprimeable number, because it can be changed into a prime (10203112121101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 323758944 + ... + 323790456.

Almost surely, 2^{10203112121100} is an apocalyptic number.

10203112121100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10203112121100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14939962489536).

10203112121100 is an abundant number, since it is smaller than the sum of its proper divisors (19676812857972).

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

10203112121100 is a wasteful number, since it uses less digits than its factorization.

10203112121100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44616 (or 44609 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 10203112121100 its reverse (112121130201), we get a palindrome (10315233251301).

The spelling of 10203112121100 in words is "ten trillion, two hundred three billion, one hundred twelve million, one hundred twenty-one thousand, one hundred".