101209530 has 64 divisors (see below), whose sum is σ = 252476928. Its totient is φ = 25945920.

The previous prime is 101209519. The next prime is 101209531. The reversal of 101209530 is 35902101.

It is a junction number, because it is equal to n+sod(n) for n = 101209497 and 101209506.

It is not an unprimeable number, because it can be changed into a prime (101209531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85845 + ... + 87015.

It is an arithmetic number, because the mean of its divisors is an integer number (3944952).

Almost surely, 2^101209530 is an apocalyptic number.

101209530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 101209530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126238464).

101209530 is an abundant number, since it is smaller than the sum of its proper divisors (151267398).

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

101209530 is a wasteful number, since it uses less digits than its factorization.

101209530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1291.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 101209530 is about 10060.2947272930. The cubic root of 101209530 is about 466.0227690005.

The spelling of 101209530 in words is "one hundred one million, two hundred nine thousand, five hundred thirty".