121022011 has 4 divisors (see below), whose sum is σ = 132024024. Its totient is φ = 110020000.

The previous prime is 121022009. The next prime is 121022023. The reversal of 121022011 is 110220121.

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 121022011 - 2¹ = 121022009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121022311) 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, 5500990 + ... + 5501011.

It is an arithmetic number, because the mean of its divisors is an integer number (33006006).

Almost surely, 2^121022011 is an apocalyptic number.

121022011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121022011 is a deficient number, since it is larger than the sum of its proper divisors (11002013).

121022011 is a wasteful number, since it uses less digits than its factorization.

121022011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11002012.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 121022011 is about 11001.0004545041. Note that the first 3 decimals coincide. The cubic root of 121022011 is about 494.6387337822.

Subtracting from 121022011 its sum of digits (10), we obtain a square (121022001 = 11001²).

Adding to 121022011 its reverse (110220121), we get a palindrome (231242132).

It can be divided in two parts, 1 and 21022011, that added together give a palindrome (21022012).

The spelling of 121022011 in words is "one hundred twenty-one million, twenty-two thousand, eleven".