12420156332 has 24 divisors (see below), whose sum is σ = 21889376880. Its totient is φ = 6166105920.

The previous prime is 12420156323. The next prime is 12420156347. The reversal of 12420156332 is 23365102421.

It is a happy number.

It is a super-2 number, since 2×12420156332² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12420156295 and 12420156304.

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, 980294 + ... + 992882.

It is an arithmetic number, because the mean of its divisors is an integer number (912057370).

Almost surely, 2^12420156332 is an apocalyptic number.

It is an amenable number.

12420156332 is a deficient number, since it is larger than the sum of its proper divisors (9469220548).

12420156332 is a wasteful number, since it uses less digits than its factorization.

12420156332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14321 (or 14319 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 12420156332 its reverse (23365102421), we get a palindrome (35785258753).

The spelling of 12420156332 in words is "twelve billion, four hundred twenty million, one hundred fifty-six thousand, three hundred thirty-two".