121012211112121 has 4 divisors (see below), whose sum is σ = 138299669842432. Its totient is φ = 103724752381812.

The previous prime is 121012211112071. The next prime is 121012211112161. The reversal of 121012211112121 is 121211112210121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121012211112121 - 2¹³ = 121012211103929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121012211112161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8643729365145 + ... + 8643729365158.

It is an arithmetic number, because the mean of its divisors is an integer number (34574917460608).

Almost surely, 2^{121012211112121} is an apocalyptic number.

It is an amenable number.

121012211112121 is a deficient number, since it is larger than the sum of its proper divisors (17287458730311).

121012211112121 is an equidigital number, since it uses as much as digits as its factorization.

121012211112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17287458730310.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 121012211112121 its reverse (121211112210121), we get a palindrome (242223323322242).

The spelling of 121012211112121 in words is "one hundred twenty-one trillion, twelve billion, two hundred eleven million, one hundred twelve thousand, one hundred twenty-one".