121100201021 has 8 divisors (see below), whose sum is σ = 122298156864. Its totient is φ = 119902672800.

The previous prime is 121100201003. The next prime is 121100201039. The reversal of 121100201021 is 120102001121.

It is an interprime number because it is at equal distance from previous prime (121100201003) and next prime (121100201039).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121100201021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121100200993 and 121100201011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121100201051) 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 7 ways as a sum of consecutive naturals, for example, 478025 + ... + 686081.

It is an arithmetic number, because the mean of its divisors is an integer number (15287269608).

Almost surely, 2^121100201021 is an apocalyptic number.

It is an amenable number.

121100201021 is a deficient number, since it is larger than the sum of its proper divisors (1197955843).

121100201021 is a wasteful number, since it uses less digits than its factorization.

121100201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213811.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121100201021 its reverse (120102001121), we get a palindrome (241202202142).

The spelling of 121100201021 in words is "one hundred twenty-one billion, one hundred million, two hundred one thousand, twenty-one".