121011021312 has 40 divisors (see below), whose sum is σ = 322380928056. Its totient is φ = 40337006592.

The previous prime is 121011021247. The next prime is 121011021317. The reversal of 121011021312 is 213120110121.

It is a junction number, because it is equal to n+sod(n) for n = 121011021291 and 121011021300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121011021317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39390073 + ... + 39393144.

Almost surely, 2^121011021312 is an apocalyptic number.

121011021312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121011021312 is an abundant number, since it is smaller than the sum of its proper divisors (201369906744).

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

121011021312 is an frugal number, since it uses more digits than its factorization.

121011021312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78783238 (or 78783222 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 121011021312 its reverse (213120110121), we get a palindrome (334131131433).

The spelling of 121011021312 in words is "one hundred twenty-one billion, eleven million, twenty-one thousand, three hundred twelve".