101201121020100 has 144 divisors (see below), whose sum is σ = 296797303256832. Its totient is φ = 26620352499840.

The previous prime is 101201121020047. The next prime is 101201121020107. The reversal of 101201121020100 is 1020121102101.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (101201121020107) 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, 12850279 + ... + 19171121.

It is an arithmetic number, because the mean of its divisors is an integer number (2061092383728).

Almost surely, 2^{101201121020100} is an apocalyptic number.

101201121020100 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 101201121020100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148398651628416).

101201121020100 is an abundant number, since it is smaller than the sum of its proper divisors (195596182236732).

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

101201121020100 is a wasteful number, since it uses less digits than its factorization.

101201121020100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6321586 (or 6321579 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 101201121020100 its reverse (1020121102101), we get a palindrome (102221242122201).

The spelling of 101201121020100 in words is "one hundred one trillion, two hundred one billion, one hundred twenty-one million, twenty thousand, one hundred".