121102122021 has 4 divisors (see below), whose sum is σ = 161469496032. Its totient is φ = 80734748012.

The previous prime is 121102121993. The next prime is 121102122041. The reversal of 121102122021 is 120221201121.

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 121102122021 - 2¹³ = 121102113829 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121102122041) 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, 20183687001 + ... + 20183687006.

It is an arithmetic number, because the mean of its divisors is an integer number (40367374008).

Almost surely, 2^121102122021 is an apocalyptic number.

It is an amenable number.

121102122021 is a deficient number, since it is larger than the sum of its proper divisors (40367374011).

121102122021 is an equidigital number, since it uses as much as digits as its factorization.

121102122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40367374010.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121102122021 its reverse (120221201121), we get a palindrome (241323323142).

The spelling of 121102122021 in words is "one hundred twenty-one billion, one hundred two million, one hundred twenty-two thousand, twenty-one".