12121011101 has 8 divisors (see below), whose sum is σ = 12856817664. Its totient is φ = 11387738560.

The previous prime is 12121011083. The next prime is 12121011121. The reversal of 12121011101 is 10111012121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12121011101 is a prime.

It is a super-2 number, since 2×12121011101² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121011121) 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, 623645 + ... + 642786.

It is an arithmetic number, because the mean of its divisors is an integer number (1607102208).

Almost surely, 2^12121011101 is an apocalyptic number.

It is an amenable number.

12121011101 is a deficient number, since it is larger than the sum of its proper divisors (735806563).

12121011101 is a wasteful number, since it uses less digits than its factorization.

12121011101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267011.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 12121011101 its reverse (10111012121), we get a palindrome (22232023222).

The spelling of 12121011101 in words is "twelve billion, one hundred twenty-one million, eleven thousand, one hundred one".