121102012021 has 8 divisors (see below), whose sum is σ = 125307025920. Its totient is φ = 116898937008.

The previous prime is 121102011977. The next prime is 121102012037. The reversal of 121102012021 is 120210201121.

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-121102012021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121102011992 and 121102012010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121102012081) 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 7 ways as a sum of consecutive naturals, for example, 357061 + ... + 608026.

It is an arithmetic number, because the mean of its divisors is an integer number (15663378240).

Almost surely, 2^121102012021 is an apocalyptic number.

It is an amenable number.

121102012021 is a deficient number, since it is larger than the sum of its proper divisors (4205013899).

121102012021 is an equidigital number, since it uses as much as digits as its factorization.

121102012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969443.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121102012021 its reverse (120210201121), we get a palindrome (241312213142).

The spelling of 121102012021 in words is "one hundred twenty-one billion, one hundred two million, twelve thousand, twenty-one".