121201012010121 has 16 divisors (see below), whose sum is σ = 171108931365504. Its totient is φ = 76046973680384.

The previous prime is 121201012010119. The next prime is 121201012010131. The reversal of 121201012010121 is 121010210102121.

It is a happy number.

121201012010121 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 121201012010121 - 2¹ = 121201012010119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121201012010121.

It is not an unprimeable number, because it can be changed into a prime (121201012010131) 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, 5787726 + ... + 16610231.

It is an arithmetic number, because the mean of its divisors is an integer number (10694308210344).

Almost surely, 2^{121201012010121} is an apocalyptic number.

It is an amenable number.

121201012010121 is a deficient number, since it is larger than the sum of its proper divisors (49907919355383).

121201012010121 is a wasteful number, since it uses less digits than its factorization.

121201012010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22504080.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121201012010121 its reverse (121010210102121), we get a palindrome (242211222112242).

The spelling of 121201012010121 in words is "one hundred twenty-one trillion, two hundred one billion, twelve million, ten thousand, one hundred twenty-one".