121100121001 has 4 divisors (see below), whose sum is σ = 127473811600. Its totient is φ = 114726430404.

The previous prime is 121100120987. The next prime is 121100121011. The reversal of 121100121001 is 100121001121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121100121001 - 2²³ = 121091732393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121100121011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3186845271 + ... + 3186845308.

It is an arithmetic number, because the mean of its divisors is an integer number (31868452900).

Almost surely, 2^121100121001 is an apocalyptic number.

It is an amenable number.

121100121001 is a deficient number, since it is larger than the sum of its proper divisors (6373690599).

121100121001 is an equidigital number, since it uses as much as digits as its factorization.

121100121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6373690598.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 121100121001 its reverse (100121001121), we get a palindrome (221221122122).

It can be divided in two parts, 121 and 100121001, that multiplied together give a palindrome (12114641121).

The spelling of 121100121001 in words is "one hundred twenty-one billion, one hundred million, one hundred twenty-one thousand, one".