121121022201 has 4 divisors (see below), whose sum is σ = 161494696272. Its totient is φ = 80747348132.

The previous prime is 121121022173. The next prime is 121121022233. The reversal of 121121022201 is 102220121121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 102220121121 = 3 ⋅34073373707.

It is a cyclic number.

It is not a de Polignac number, because 121121022201 - 2²⁵ = 121087467769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121121022601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20186837031 + ... + 20186837036.

It is an arithmetic number, because the mean of its divisors is an integer number (40373674068).

Almost surely, 2^121121022201 is an apocalyptic number.

It is an amenable number.

121121022201 is a deficient number, since it is larger than the sum of its proper divisors (40373674071).

121121022201 is an equidigital number, since it uses as much as digits as its factorization.

121121022201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40373674070.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121121022201 its reverse (102220121121), we get a palindrome (223341143322).

The spelling of 121121022201 in words is "one hundred twenty-one billion, one hundred twenty-one million, twenty-two thousand, two hundred one".