121021222202111 has 16 divisors (see below), whose sum is σ = 157443758304768. Its totient is φ = 90202153192800.

The previous prime is 121021222202107. The next prime is 121021222202173. The reversal of 121021222202111 is 111202222120121.

It is not a de Polignac number, because 121021222202111 - 2² = 121021222202107 is a prime.

It is a super-2 number, since 2×121021222202111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121021222202911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34167480500 + ... + 34167484041.

It is an arithmetic number, because the mean of its divisors is an integer number (9840234894048).

Almost surely, 2^{121021222202111} is an apocalyptic number.

121021222202111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121021222202111 is a deficient number, since it is larger than the sum of its proper divisors (36422536102657).

121021222202111 is a wasteful number, since it uses less digits than its factorization.

121021222202111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68334964582.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 121021222202111 its reverse (111202222120121), we get a palindrome (232223444322232).

The spelling of 121021222202111 in words is "one hundred twenty-one trillion, twenty-one billion, two hundred twenty-two million, two hundred two thousand, one hundred eleven".