121023640 has 32 divisors (see below), whose sum is σ = 272699280. Its totient is φ = 48339072.

The previous prime is 121023593. The next prime is 121023647. The reversal of 121023640 is 46320121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121023647) 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, 32347 + ... + 35893.

Almost surely, 2^121023640 is an apocalyptic number.

121023640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121023640 is an abundant number, since it is smaller than the sum of its proper divisors (151675640).

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

121023640 is a wasteful number, since it uses less digits than its factorization.

121023640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4411 (or 4407 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 121023640 is about 11001.0744929757. The cubic root of 121023640 is about 494.6409531109.

Adding to 121023640 its reverse (46320121), we get a palindrome (167343761).

The spelling of 121023640 in words is "one hundred twenty-one million, twenty-three thousand, six hundred forty".