121120210121 has 4 divisors (see below), whose sum is σ = 121155148752. Its totient is φ = 121085271492.

The previous prime is 121120210111. The next prime is 121120210151. The reversal of 121120210121 is 121012021121.

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 121120210121 - 2²² = 121116015817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121120210096 and 121120210105.

It is not an unprimeable number, because it can be changed into a prime (121120210111) 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, 17464115 + ... + 17471048.

It is an arithmetic number, because the mean of its divisors is an integer number (30288787188).

Almost surely, 2^121120210121 is an apocalyptic number.

It is an amenable number.

121120210121 is a deficient number, since it is larger than the sum of its proper divisors (34938631).

121120210121 is an equidigital number, since it uses as much as digits as its factorization.

121120210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34938630.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121120210121 its reverse (121012021121), we get a palindrome (242132231242).

The spelling of 121120210121 in words is "one hundred twenty-one billion, one hundred twenty million, two hundred ten thousand, one hundred twenty-one".