12122121011 has 32 divisors (see below), whose sum is σ = 17132505600. Its totient is φ = 8260289280.

The previous prime is 12122121007. The next prime is 12122121071. The reversal of 12122121011 is 11012122121.

It is a cyclic number.

It is not a de Polignac number, because 12122121011 - 2² = 12122121007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12122121071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 299666 + ... + 337703.

It is an arithmetic number, because the mean of its divisors is an integer number (535390800).

Almost surely, 2^12122121011 is an apocalyptic number.

12122121011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12122121011 is a deficient number, since it is larger than the sum of its proper divisors (5010384589).

12122121011 is a wasteful number, since it uses less digits than its factorization.

12122121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637419.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12122121011 its reverse (11012122121), we get a palindrome (23134243132).

The spelling of 12122121011 in words is "twelve billion, one hundred twenty-two million, one hundred twenty-one thousand, eleven".