101221240 has 32 divisors (see below), whose sum is σ = 228047760. Its totient is φ = 40435200.

The previous prime is 101221201. The next prime is 101221259. The reversal of 101221240 is 42122101.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 101221240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45760 + ... + 47920.

Almost surely, 2^101221240 is an apocalyptic number.

101221240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101221240 is an abundant number, since it is smaller than the sum of its proper divisors (126826520).

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

101221240 is a wasteful number, since it uses less digits than its factorization.

101221240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3343 (or 3339 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 101221240 is about 10060.8767013616. The cubic root of 101221240 is about 466.0407413403.

Adding to 101221240 its reverse (42122101), we get a palindrome (143343341).

The spelling of 101221240 in words is "one hundred one million, two hundred twenty-one thousand, two hundred forty".