121123212021201 has 16 divisors (see below), whose sum is σ = 173957728000896. Its totient is φ = 74521410487296.

The previous prime is 121123212021151. The next prime is 121123212021223. The reversal of 121123212021201 is 102120212321121.

It is not a de Polignac number, because 121123212021201 - 2³⁷ = 120985773067729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121123212021271) 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, 332122845 + ... + 332487338.

It is an arithmetic number, because the mean of its divisors is an integer number (10872358000056).

Almost surely, 2^{121123212021201} is an apocalyptic number.

It is an amenable number.

121123212021201 is a deficient number, since it is larger than the sum of its proper divisors (52834515979695).

121123212021201 is a wasteful number, since it uses less digits than its factorization.

121123212021201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664614872.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 121123212021201 its reverse (102120212321121), we get a palindrome (223243424342322).

The spelling of 121123212021201 in words is "one hundred twenty-one trillion, one hundred twenty-three billion, two hundred twelve million, twenty-one thousand, two hundred one".