121202111001 has 16 divisors (see below), whose sum is σ = 164146282560. Its totient is φ = 79538923200.

The previous prime is 121202110961. The next prime is 121202111011. The reversal of 121202111001 is 100111202121.

It is not a de Polignac number, because 121202111001 - 2¹⁹ = 121201586713 is a prime.

It is a super-2 number, since 2×121202111001² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121202111011) 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 15 ways as a sum of consecutive naturals, for example, 1103671 + ... + 1208508.

It is an arithmetic number, because the mean of its divisors is an integer number (10259142660).

Almost surely, 2^121202111001 is an apocalyptic number.

It is an amenable number.

121202111001 is a deficient number, since it is larger than the sum of its proper divisors (42944171559).

121202111001 is a wasteful number, since it uses less digits than its factorization.

121202111001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2312456.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121202111001 its reverse (100111202121), we get a palindrome (221313313122).

The spelling of 121202111001 in words is "one hundred twenty-one billion, two hundred two million, one hundred eleven thousand, one".