12121203040 has 48 divisors (see below), whose sum is σ = 28644023520. Its totient is φ = 4847180800.

The previous prime is 12121203037. The next prime is 12121203041. The reversal of 12121203040 is 4030212121.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121203041) 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, 779340 + ... + 794740.

It is an arithmetic number, because the mean of its divisors is an integer number (596750490).

Almost surely, 2^12121203040 is an apocalyptic number.

12121203040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12121203040 is an abundant number, since it is smaller than the sum of its proper divisors (16522820480).

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

12121203040 is a wasteful number, since it uses less digits than its factorization.

12121203040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20335 (or 20327 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 12121203040 its reverse (4030212121), we get a palindrome (16151415161).

The spelling of 12121203040 in words is "twelve billion, one hundred twenty-one million, two hundred three thousand, forty".