12121763881 has 8 divisors (see below), whose sum is σ = 12167064000. Its totient is φ = 12076528560.

The previous prime is 12121763869. The next prime is 12121763921. The reversal of 12121763881 is 18836712121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12121763881 - 2¹³ = 12121755689 is a prime.

It is a super-2 number, since 2×12121763881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12121763821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 376195 + ... + 407143.

It is an arithmetic number, because the mean of its divisors is an integer number (1520883000).

Almost surely, 2^12121763881 is an apocalyptic number.

It is an amenable number.

12121763881 is a deficient number, since it is larger than the sum of its proper divisors (45300119).

12121763881 is a wasteful number, since it uses less digits than its factorization.

12121763881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32399.

The product of its digits is 32256, while the sum is 40.

The spelling of 12121763881 in words is "twelve billion, one hundred twenty-one million, seven hundred sixty-three thousand, eight hundred eighty-one".