121030440 has 32 divisors (see below), whose sum is σ = 363091680. Its totient is φ = 32274752.

The previous prime is 121030433. The next prime is 121030447. The reversal of 121030440 is 44030121.

It is an interprime number because it is at equal distance from previous prime (121030433) and next prime (121030447).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (121030447) 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, 504174 + ... + 504413.

It is an arithmetic number, because the mean of its divisors is an integer number (11346615).

Almost surely, 2^121030440 is an apocalyptic number.

121030440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121030440 is an abundant number, since it is smaller than the sum of its proper divisors (242061240).

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

121030440 is a wasteful number, since it uses less digits than its factorization.

121030440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008601 (or 1008597 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 121030440 is about 11001.3835493541. The cubic root of 121030440 is about 494.6502171288.

Adding to 121030440 its reverse (44030121), we get a palindrome (165060561).

The spelling of 121030440 in words is "one hundred twenty-one million, thirty thousand, four hundred forty".