12021297510 has 16 divisors (see below), whose sum is σ = 28851114096. Its totient is φ = 3205679328.

The previous prime is 12021297487. The next prime is 12021297523. The reversal of 12021297510 is 1579212021.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 400709917 = 12021297510 / (1 + 2 + 0 + 2 + 1 + 2 + 9 + 7 + 5 + 1 + 0).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200354929 + ... + 200354988.

It is an arithmetic number, because the mean of its divisors is an integer number (1803194631).

Almost surely, 2^12021297510 is an apocalyptic number.

12021297510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12021297510 is an abundant number, since it is smaller than the sum of its proper divisors (16829816586).

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

12021297510 is a wasteful number, since it uses less digits than its factorization.

12021297510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400709927.

The product of its (nonzero) digits is 2520, while the sum is 30.

The spelling of 12021297510 in words is "twelve billion, twenty-one million, two hundred ninety-seven thousand, five hundred ten".