121002100021201 has 16 divisors (see below), whose sum is σ = 148955500412928. Its totient is φ = 96006474867600.

The previous prime is 121002100021199. The next prime is 121002100021303. The reversal of 121002100021201 is 102120001200121.

It is a cyclic number.

It is not a de Polignac number, because 121002100021201 - 2¹ = 121002100021199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121002100021801) 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, 12122024665 + ... + 12122034646.

It is an arithmetic number, because the mean of its divisors is an integer number (9309718775808).

Almost surely, 2^{121002100021201} is an apocalyptic number.

It is an amenable number.

121002100021201 is a deficient number, since it is larger than the sum of its proper divisors (27953400391727).

121002100021201 is a wasteful number, since it uses less digits than its factorization.

121002100021201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24244059372.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121002100021201 its reverse (102120001200121), we get a palindrome (223122101221322).

The spelling of 121002100021201 in words is "one hundred twenty-one trillion, two billion, one hundred million, twenty-one thousand, two hundred one".