101220130 has 24 divisors (see below), whose sum is σ = 200267676. Its totient is φ = 36806880.

The previous prime is 101220113. The next prime is 101220137. The reversal of 101220130 is 31022101.

It can be written as a sum of positive squares in 2 ways, for example, as 81956809 + 19263321 = 9053^2 + 4389^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (101220137) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40617 + ... + 43036.

Almost surely, 2^101220130 is an apocalyptic number.

101220130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

101220130 is a deficient number, since it is larger than the sum of its proper divisors (99047546).

101220130 is a wasteful number, since it uses less digits than its factorization.

101220130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83682 (or 83671 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 101220130 is about 10060.8215370317. The cubic root of 101220130 is about 466.0390377877.

Adding to 101220130 its reverse (31022101), we get a palindrome (132242231).

The spelling of 101220130 in words is "one hundred one million, two hundred twenty thousand, one hundred thirty".