121010210220121 has 4 divisors (see below), whose sum is σ = 124913765388544. Its totient is φ = 117106655051700.

The previous prime is 121010210220047. The next prime is 121010210220143. The reversal of 121010210220121 is 121022012010121.

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 121010210220121 - 2¹³ = 121010210211929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121010210220095 and 121010210220104.

It is not an unprimeable number, because it can be changed into a prime (121010210220161) 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, 1951777584165 + ... + 1951777584226.

It is an arithmetic number, because the mean of its divisors is an integer number (31228441347136).

Almost surely, 2^{121010210220121} is an apocalyptic number.

It is an amenable number.

121010210220121 is a deficient number, since it is larger than the sum of its proper divisors (3903555168423).

121010210220121 is an equidigital number, since it uses as much as digits as its factorization.

121010210220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3903555168422.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121010210220121 its reverse (121022012010121), we get a palindrome (242032222230242).

The spelling of 121010210220121 in words is "one hundred twenty-one trillion, ten billion, two hundred ten million, two hundred twenty thousand, one hundred twenty-one".