101221300 has 18 divisors (see below), whose sum is σ = 219650438. Its totient is φ = 40488480.

The previous prime is 101221297. The next prime is 101221313. The reversal of 101221300 is 3122101.

It can be written as a sum of positive squares in 3 ways, for example, as 138384 + 101082916 = 372^2 + 10054^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 506007 + ... + 506206.

Almost surely, 2^101221300 is an apocalyptic number.

101221300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101221300 is an abundant number, since it is smaller than the sum of its proper divisors (118429138).

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

101221300 is a wasteful number, since it uses less digits than its factorization.

101221300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012227 (or 1012220 counting only the distinct ones).

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

The square root of 101221300 is about 10060.8796832086. The cubic root of 101221300 is about 466.0408334238.

Adding to 101221300 its reverse (3122101), we get a palindrome (104343401).

The spelling of 101221300 in words is "one hundred one million, two hundred twenty-one thousand, three hundred".