121211120001 has 16 divisors (see below), whose sum is σ = 164280531008. Its totient is φ = 79474824000.

The previous prime is 121211119961. The next prime is 121211120039. The reversal of 121211120001 is 100021112121.

It is not a de Polignac number, because 121211120001 - 2¹⁴ = 121211103617 is a prime.

It is a super-2 number, since 2×121211120001² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121211120081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2251935 + ... + 2305131.

It is an arithmetic number, because the mean of its divisors is an integer number (10267533188).

Almost surely, 2^121211120001 is an apocalyptic number.

It is an amenable number.

121211120001 is a deficient number, since it is larger than the sum of its proper divisors (43069411007).

121211120001 is a wasteful number, since it uses less digits than its factorization.

121211120001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65712.

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

Adding to 121211120001 its reverse (100021112121), we get a palindrome (221232232122).

The spelling of 121211120001 in words is "one hundred twenty-one billion, two hundred eleven million, one hundred twenty thousand, one".