120121242121021 has 32 divisors (see below), whose sum is σ = 122082521210496. Its totient is φ = 118178105760000.

The previous prime is 120121242121019. The next prime is 120121242121043.

120121242121021 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 120121242121021 - 2¹ = 120121242121019 is a prime.

It is a super-2 number, since 2×120121242121021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120121242120983 and 120121242121001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120121242121061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13998508951 + ... + 13998517531.

It is an arithmetic number, because the mean of its divisors is an integer number (3815078787828).

Almost surely, 2^{120121242121021} is an apocalyptic number.

It is an amenable number.

120121242121021 is a deficient number, since it is larger than the sum of its proper divisors (1961279089475).

120121242121021 is a wasteful number, since it uses less digits than its factorization.

120121242121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10333.

The product of its (nonzero) digits is 256, while the sum is 22.

The spelling of 120121242121021 in words is "one hundred twenty trillion, one hundred twenty-one billion, two hundred forty-two million, one hundred twenty-one thousand, twenty-one".