121211001020121 has 8 divisors (see below), whose sum is σ = 167187587614080. Its totient is φ = 78020874219792.

The previous prime is 121211001020119. The next prime is 121211001020173. The reversal of 121211001020121 is 121020100112121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121211001020121 - 2¹ = 121211001020119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121211001020121.

It is not an unprimeable number, because it can be changed into a prime (121211001020821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 696614948305 + ... + 696614948478.

It is an arithmetic number, because the mean of its divisors is an integer number (20898448451760).

Almost surely, 2^{121211001020121} is an apocalyptic number.

It is an amenable number.

121211001020121 is a deficient number, since it is larger than the sum of its proper divisors (45976586593959).

121211001020121 is a wasteful number, since it uses less digits than its factorization.

121211001020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393229896815.

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

Adding to 121211001020121 its reverse (121020100112121), we get a palindrome (242231101132242).

The spelling of 121211001020121 in words is "one hundred twenty-one trillion, two hundred eleven billion, one million, twenty thousand, one hundred twenty-one".