121201022121 has 32 divisors (see below), whose sum is σ = 168843214848. Its totient is φ = 77247717120.

The previous prime is 121201022119. The next prime is 121201022123. The reversal of 121201022121 is 121220102121.

It is an interprime number because it is at equal distance from previous prime (121201022119) and next prime (121201022123).

It is not a de Polignac number, because 121201022121 - 2¹ = 121201022119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121201022121.

It is not an unprimeable number, because it can be changed into a prime (121201022123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3207480 + ... + 3245046.

It is an arithmetic number, because the mean of its divisors is an integer number (5276350464).

Almost surely, 2^121201022121 is an apocalyptic number.

It is an amenable number.

121201022121 is a deficient number, since it is larger than the sum of its proper divisors (47642192727).

121201022121 is a wasteful number, since it uses less digits than its factorization.

121201022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38021.

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

Adding to 121201022121 its reverse (121220102121), we get a palindrome (242421124242).

The spelling of 121201022121 in words is "one hundred twenty-one billion, two hundred one million, twenty-two thousand, one hundred twenty-one".