121102021011021 has 4 divisors (see below), whose sum is σ = 161469361348032. Its totient is φ = 80734680674012.

The previous prime is 121102021010977. The next prime is 121102021011187. The reversal of 121102021011021 is 120110120201121.

It is a happy number.

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 121102021011021 - 2¹³ = 121102021002829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121102021015021) 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, 20183670168501 + ... + 20183670168506.

It is an arithmetic number, because the mean of its divisors is an integer number (40367340337008).

Almost surely, 2^{121102021011021} is an apocalyptic number.

It is an amenable number.

121102021011021 is a deficient number, since it is larger than the sum of its proper divisors (40367340337011).

121102021011021 is an equidigital number, since it uses as much as digits as its factorization.

121102021011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40367340337010.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121102021011021 its reverse (120110120201121), we get a palindrome (241212141212142).

The spelling of 121102021011021 in words is "one hundred twenty-one trillion, one hundred two billion, twenty-one million, eleven thousand, twenty-one".