121021202123 has 16 divisors (see below), whose sum is σ = 125664443520. Its totient is φ = 116471851776.

The previous prime is 121021202089. The next prime is 121021202153. The reversal of 121021202123 is 321202120121.

It is a cyclic number.

It is not a de Polignac number, because 121021202123 - 2⁶ = 121021202059 is a prime.

It is a super-3 number, since 3×121021202123³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121021202153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 882908 + ... + 1010726.

It is an arithmetic number, because the mean of its divisors is an integer number (7854027720).

Almost surely, 2^121021202123 is an apocalyptic number.

121021202123 is a deficient number, since it is larger than the sum of its proper divisors (4643241397).

121021202123 is a wasteful number, since it uses less digits than its factorization.

121021202123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128186.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 121021202123 its reverse (321202120121), we get a palindrome (442223322244).

The spelling of 121021202123 in words is "one hundred twenty-one billion, twenty-one million, two hundred two thousand, one hundred twenty-three".