121100120001 has 12 divisors (see below), whose sum is σ = 199911309312. Its totient is φ = 69200068536.

The previous prime is 121100119981. The next prime is 121100120021. The reversal of 121100120001 is 100021001121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121100119981) and next prime (121100120021).

It is not a de Polignac number, because 121100120001 - 2²¹ = 121098022849 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 (121100120021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 961112001 + ... + 961112126.

It is an arithmetic number, because the mean of its divisors is an integer number (16659275776).

Almost surely, 2^121100120001 is an apocalyptic number.

It is an amenable number.

121100120001 is a deficient number, since it is larger than the sum of its proper divisors (78811189311).

121100120001 is a wasteful number, since it uses less digits than its factorization.

121100120001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1922224140 (or 1922224137 counting only the distinct ones).

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

Adding to 121100120001 its reverse (100021001121), we get a palindrome (221121121122).

The spelling of 121100120001 in words is "one hundred twenty-one billion, one hundred million, one hundred twenty thousand, one".