12021221202111 has 32 divisors (see below), whose sum is σ = 19428499833600. Its totient is φ = 7285489777440.

The previous prime is 12021221202101. The next prime is 12021221202119. The reversal of 12021221202111 is 11120212212021.

12021221202111 is a `hidden beast` number, since 120 + 212 + 2 + 120 + 211 + 1 = 666.

It is not a de Polignac number, because 12021221202111 - 2¹¹ = 12021221200063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021221202119) 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, 25827825 + ... + 26289141.

It is an arithmetic number, because the mean of its divisors is an integer number (607140619800).

Almost surely, 2^{12021221202111} is an apocalyptic number.

12021221202111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12021221202111 is a deficient number, since it is larger than the sum of its proper divisors (7407278631489).

12021221202111 is a wasteful number, since it uses less digits than its factorization.

12021221202111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549076 (or 549070 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12021221202111 its reverse (11120212212021), we get a palindrome (23141433414132).

It can be divided in two parts, 120212212021 and 11, that multiplied together give a palindrome (1322334332231).

The spelling of 12021221202111 in words is "twelve trillion, twenty-one billion, two hundred twenty-one million, two hundred two thousand, one hundred eleven".