120121121021 has 4 divisors (see below), whose sum is σ = 131041222944. Its totient is φ = 109201019100.

The previous prime is 120121121017. The next prime is 120121121027.

120121121021 is nontrivially palindromic in base 10.

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 120121121021 - 2² = 120121121017 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 = 120121120987 and 120121121005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120121121027) 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, 5460050945 + ... + 5460050966.

It is an arithmetic number, because the mean of its divisors is an integer number (32760305736).

Almost surely, 2^120121121021 is an apocalyptic number.

120121121021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

120121121021 is a deficient number, since it is larger than the sum of its proper divisors (10920101923).

120121121021 is a wasteful number, since it uses less digits than its factorization.

120121121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10920101922.

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

It can be divided in two parts, 120121 and 121021, that added together give a palindrome (241142).

The spelling of 120121121021 in words is "one hundred twenty billion, one hundred twenty-one million, one hundred twenty-one thousand, twenty-one".