12021531025 has 12 divisors (see below), whose sum is σ = 17036227072. Its totient is φ = 8243335440.

The previous prime is 12021530987. The next prime is 12021531029. The reversal of 12021531025 is 52013512021.

It is not a de Polignac number, because 12021531025 - 2⁹ = 12021530513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12021530987 and 12021531005.

It is not an unprimeable number, because it can be changed into a prime (12021531029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34347057 + ... + 34347406.

Almost surely, 2^12021531025 is an apocalyptic number.

It is an amenable number.

12021531025 is a deficient number, since it is larger than the sum of its proper divisors (5014696047).

12021531025 is an equidigital number, since it uses as much as digits as its factorization.

12021531025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68694480 (or 68694475 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The spelling of 12021531025 in words is "twelve billion, twenty-one million, five hundred thirty-one thousand, twenty-five".