12011021012 has 24 divisors (see below), whose sum is σ = 21568075200. Its totient is φ = 5849205440.

The previous prime is 12011021003. The next prime is 12011021027. The reversal of 12011021012 is 21012011021.

It is a junction number, because it is equal to n+sod(n) for n = 12011020984 and 12011021002.

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, 37103 + ... + 159369.

It is an arithmetic number, because the mean of its divisors is an integer number (898669800).

Almost surely, 2^12011021012 is an apocalyptic number.

It is an amenable number.

12011021012 is a deficient number, since it is larger than the sum of its proper divisors (9557054188).

12011021012 is a wasteful number, since it uses less digits than its factorization.

12011021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122911 (or 122909 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 12011021012 its reverse (21012011021), we get a palindrome (33023032033).

Subtracting 12011021012 from its reverse (21012011021), we obtain a palindrome (9000990009).

The spelling of 12011021012 in words is "twelve billion, eleven million, twenty-one thousand, twelve".