121321212200111 has 16 divisors (see below), whose sum is σ = 152221039526400. Its totient is φ = 93933869309280.

The previous prime is 121321212200087. The next prime is 121321212200183. The reversal of 121321212200111 is 111002212123121.

It is not a de Polignac number, because 121321212200111 - 2¹⁸ = 121321211937967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121321212200911) 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, 5017822811 + ... + 5017846988.

It is an arithmetic number, because the mean of its divisors is an integer number (9513814970400).

Almost surely, 2^{121321212200111} is an apocalyptic number.

121321212200111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121321212200111 is a deficient number, since it is larger than the sum of its proper divisors (30899827326289).

121321212200111 is a wasteful number, since it uses less digits than its factorization.

121321212200111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10035669974.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 121321212200111 its reverse (111002212123121), we get a palindrome (232323424323232).

The spelling of 121321212200111 in words is "one hundred twenty-one trillion, three hundred twenty-one billion, two hundred twelve million, two hundred thousand, one hundred eleven".