121001210200111 has 16 divisors (see below), whose sum is σ = 125543330640000. Its totient is φ = 116535365856000.

The previous prime is 121001210200081. The next prime is 121001210200127. The reversal of 121001210200111 is 111002012100121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121001210200111 - 2⁹ = 121001210199599 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121001210200091 and 121001210200100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121001210200141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15371961 + ... + 21870061.

It is an arithmetic number, because the mean of its divisors is an integer number (7846458165000).

Almost surely, 2^{121001210200111} is an apocalyptic number.

121001210200111 is a deficient number, since it is larger than the sum of its proper divisors (4542120439889).

121001210200111 is an equidigital number, since it uses as much as digits as its factorization.

121001210200111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6503970.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121001210200111 its reverse (111002012100121), we get a palindrome (232003222300232).

The spelling of 121001210200111 in words is "one hundred twenty-one trillion, one billion, two hundred ten million, two hundred thousand, one hundred eleven".