121201022021 has 16 divisors (see below), whose sum is σ = 127947980160. Its totient is φ = 114491361600.

The previous prime is 121201022009. The next prime is 121201022027. The reversal of 121201022021 is 120220102121.

It is a cyclic number.

It is not a de Polignac number, because 121201022021 - 2⁶ = 121201021957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121201021987 and 121201022005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121201022027) 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, 9676655 + ... + 9689171.

It is an arithmetic number, because the mean of its divisors is an integer number (7996748760).

Almost surely, 2^121201022021 is an apocalyptic number.

It is an amenable number.

121201022021 is a deficient number, since it is larger than the sum of its proper divisors (6746958139).

121201022021 is a wasteful number, since it uses less digits than its factorization.

121201022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13964.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 121201022021 its reverse (120220102121), we get a palindrome (241421124142).

The spelling of 121201022021 in words is "one hundred twenty-one billion, two hundred one million, twenty-two thousand, twenty-one".