121010110001001 has 80 divisors (see below), whose sum is σ = 195019865187840. Its totient is φ = 74335322332800.

The previous prime is 121010110000981. The next prime is 121010110001047. The reversal of 121010110001001 is 100100011010121.

It is not a de Polignac number, because 121010110001001 - 2¹³ = 121010109992809 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (121010110001701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2038859476 + ... + 2038918826.

It is an arithmetic number, because the mean of its divisors is an integer number (2437748314848).

Almost surely, 2^{121010110001001} is an apocalyptic number.

It is an amenable number.

121010110001001 is a deficient number, since it is larger than the sum of its proper divisors (74009755186839).

121010110001001 is a wasteful number, since it uses less digits than its factorization.

121010110001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62788 (or 62779 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 121010110001001 its reverse (100100011010121), we get a palindrome (221110121011122).

The spelling of 121010110001001 in words is "one hundred twenty-one trillion, ten billion, one hundred ten million, one thousand, one".