121212010010121 has 16 divisors (see below), whose sum is σ = 164037628083264. Its totient is φ = 79597338061824.

The previous prime is 121212010010087. The next prime is 121212010010149. The reversal of 121212010010121 is 121010010212121.

It is a happy number.

It is not a de Polignac number, because 121212010010121 - 2⁴² = 116813963499017 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121212010010121.

It is not an unprimeable number, because it can be changed into a prime (121212010020121) 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, 13839856 + ... + 20831841.

It is an arithmetic number, because the mean of its divisors is an integer number (10252351755204).

Almost surely, 2^{121212010010121} is an apocalyptic number.

It is an amenable number.

121212010010121 is a deficient number, since it is larger than the sum of its proper divisors (42825618073143).

121212010010121 is a wasteful number, since it uses less digits than its factorization.

121212010010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34689160.

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

Adding to 121212010010121 its reverse (121010010212121), we get a palindrome (242222020222242).

The spelling of 121212010010121 in words is "one hundred twenty-one trillion, two hundred twelve billion, ten million, ten thousand, one hundred twenty-one".