101921240 has 32 divisors (see below), whose sum is σ = 233087760. Its totient is φ = 40099200.

The previous prime is 101921227. The next prime is 101921243. The reversal of 101921240 is 42129101.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101921243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18446 + ... + 23325.

Almost surely, 2^101921240 is an apocalyptic number.

101921240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101921240 is an abundant number, since it is smaller than the sum of its proper divisors (131166520).

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

101921240 is a wasteful number, since it uses less digits than its factorization.

101921240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41843 (or 41839 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 101921240 is about 10095.6049843484. The cubic root of 101921240 is about 467.1125828462.

The spelling of 101921240 in words is "one hundred one million, nine hundred twenty-one thousand, two hundred forty".