101002100 has 144 divisors (see below), whose sum is σ = 253108800. Its totient is φ = 34744320.

The previous prime is 101002093. The next prime is 101002103. The reversal of 101002100 is 1200101.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (5).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101002103) 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, 1711871 + ... + 1711929.

It is an arithmetic number, because the mean of its divisors is an integer number (1757700).

Almost surely, 2^101002100 is an apocalyptic number.

101002100 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 101002100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126554400).

101002100 is an abundant number, since it is smaller than the sum of its proper divisors (152106700).

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

101002100 is a wasteful number, since it uses less digits than its factorization.

101002100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 5.

The square root of 101002100 is about 10049.9800994828. The cubic root of 101002100 is about 465.7041783884.

Adding to 101002100 its reverse (1200101), we get a palindrome (102202201).

The spelling of 101002100 in words is "one hundred one million, two thousand, one hundred".