121012100212121 has 4 divisors (see below), whose sum is σ = 121013881467600. Its totient is φ = 121010318956644.

The previous prime is 121012100212111. The next prime is 121012100212169. The reversal of 121012100212121 is 121212001210121.

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 121012100212121 - 2¹⁴ = 121012100195737 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121012100212121.

It is not an unprimeable number, because it can be changed into a prime (121012100212111) 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, 890525831 + ... + 890661708.

It is an arithmetic number, because the mean of its divisors is an integer number (30253470366900).

Almost surely, 2^{121012100212121} is an apocalyptic number.

It is an amenable number.

121012100212121 is a deficient number, since it is larger than the sum of its proper divisors (1781255479).

121012100212121 is an equidigital number, since it uses as much as digits as its factorization.

121012100212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1781255478.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121012100212121 its reverse (121212001210121), we get a palindrome (242224101422242).

The spelling of 121012100212121 in words is "one hundred twenty-one trillion, twelve billion, one hundred million, two hundred twelve thousand, one hundred twenty-one".