101121240 has 64 divisors (see below), whose sum is σ = 330946560. Its totient is φ = 24513920.

The previous prime is 101121203. The next prime is 101121247. The reversal of 101121240 is 42121101.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101121247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36984 + ... + 39623.

It is an arithmetic number, because the mean of its divisors is an integer number (5171040).

Almost surely, 2^101121240 is an apocalyptic number.

101121240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101121240 is an abundant number, since it is smaller than the sum of its proper divisors (229825320).

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

101121240 is a wasteful number, since it uses less digits than its factorization.

101121240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76632 (or 76628 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 101121240 is about 10055.9057274817. The cubic root of 101121240 is about 465.8872181277.

Adding to 101121240 its reverse (42121101), we get a palindrome (143242341).

The spelling of 101121240 in words is "one hundred one million, one hundred twenty-one thousand, two hundred forty".