101002120 has 16 divisors (see below), whose sum is σ = 227254860. Its totient is φ = 40400832.

The previous prime is 101002103. The next prime is 101002127. The reversal of 101002120 is 21200101.

It can be written as a sum of positive squares in 2 ways, for example, as 96864964 + 4137156 = 9842^2 + 2034^2 .

It is not an unprimeable number, because it can be changed into a prime (101002127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1262487 + ... + 1262566.

Almost surely, 2^101002120 is an apocalyptic number.

101002120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101002120 is an abundant number, since it is smaller than the sum of its proper divisors (126252740).

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

101002120 is a wasteful number, since it uses less digits than its factorization.

101002120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2525064 (or 2525060 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 101002120 is about 10049.9810945096. The cubic root of 101002120 is about 465.7042091273.

Adding to 101002120 its reverse (21200101), we get a palindrome (122202221).

The spelling of 101002120 in words is "one hundred one million, two thousand, one hundred twenty".