121022121011 has 4 divisors (see below), whose sum is σ = 132024132024. Its totient is φ = 110020110000.

The previous prime is 121022121007. The next prime is 121022121013. The reversal of 121022121011 is 110121220121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121022121011 - 2² = 121022121007 is a prime.

It is a super-2 number, since 2×121022121011² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121022121013) 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, 5501005490 + ... + 5501005511.

It is an arithmetic number, because the mean of its divisors is an integer number (33006033006).

Almost surely, 2^121022121011 is an apocalyptic number.

121022121011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121022121011 is a deficient number, since it is larger than the sum of its proper divisors (11002011013).

121022121011 is a wasteful number, since it uses less digits than its factorization.

121022121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11002011012.

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

Adding to 121022121011 its reverse (110121220121), we get a palindrome (231143341132).

The spelling of 121022121011 in words is "one hundred twenty-one billion, twenty-two million, one hundred twenty-one thousand, eleven".