121210020111 has 32 divisors (see below), whose sum is σ = 175437301248. Its totient is φ = 74141383680.

The previous prime is 121210020103. The next prime is 121210020121. The reversal of 121210020111 is 111020012121.

It is not a de Polignac number, because 121210020111 - 2³ = 121210020103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121210020121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1089510 + ... + 1195596.

It is an arithmetic number, because the mean of its divisors is an integer number (5482415664).

Almost surely, 2^121210020111 is an apocalyptic number.

121210020111 is a deficient number, since it is larger than the sum of its proper divisors (54227281137).

121210020111 is a wasteful number, since it uses less digits than its factorization.

121210020111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106671.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121210020111 its reverse (111020012121), we get a palindrome (232230032232).

The spelling of 121210020111 in words is "one hundred twenty-one billion, two hundred ten million, twenty thousand, one hundred eleven".