121010020101 has 24 divisors (see below), whose sum is σ = 177637975424. Its totient is φ = 79363152000.

The previous prime is 121010020099. The next prime is 121010020163. The reversal of 121010020101 is 101020010121.

It is a happy number.

It is not a de Polignac number, because 121010020101 - 2¹ = 121010020099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121010020171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 319245 + ... + 586461.

Almost surely, 2^121010020101 is an apocalyptic number.

It is an amenable number.

121010020101 is a deficient number, since it is larger than the sum of its proper divisors (56627955323).

121010020101 is a wasteful number, since it uses less digits than its factorization.

121010020101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268041 (or 268038 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 121010020101 its reverse (101020010121), we get a palindrome (222030030222).

It can be divided in two parts, 121010020 and 101, that added together give a palindrome (121010121).

The spelling of 121010020101 in words is "one hundred twenty-one billion, ten million, twenty thousand, one hundred one".