121020121211201 has 16 divisors (see below), whose sum is σ = 128971152806400. Its totient is φ = 113293290040128.

The previous prime is 121020121211153. The next prime is 121020121211281. The reversal of 121020121211201 is 102112121020121.

It is a de Polignac number, because none of the positive numbers 2^k-121020121211201 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 121020121211201.

It is not an unprimeable number, because it can be changed into a prime (121020121211281) 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, 57633335 + ... + 59696243.

It is an arithmetic number, because the mean of its divisors is an integer number (8060697050400).

Almost surely, 2^{121020121211201} is an apocalyptic number.

It is an amenable number.

121020121211201 is a deficient number, since it is larger than the sum of its proper divisors (7951031595199).

121020121211201 is a wasteful number, since it uses less digits than its factorization.

121020121211201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2117248.

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

Adding to 121020121211201 its reverse (102112121020121), we get a palindrome (223132242231322).

The spelling of 121020121211201 in words is "one hundred twenty-one trillion, twenty billion, one hundred twenty-one million, two hundred eleven thousand, two hundred one".