120121443021 has 4 divisors (see below), whose sum is σ = 160161924032. Its totient is φ = 80080962012.

The previous prime is 120121442953. The next prime is 120121443023. The reversal of 120121443021 is 120344121021.

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 not a de Polignac number, because 120121443021 - 2¹¹ = 120121440973 is a prime.

It is a super-2 number, since 2×120121443021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120121443023) 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, 20020240501 + ... + 20020240506.

It is an arithmetic number, because the mean of its divisors is an integer number (40040481008).

Almost surely, 2^120121443021 is an apocalyptic number.

It is an amenable number.

120121443021 is a deficient number, since it is larger than the sum of its proper divisors (40040481011).

120121443021 is an equidigital number, since it uses as much as digits as its factorization.

120121443021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40040481010.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 120121443021 its reverse (120344121021), we get a palindrome (240465564042).

The spelling of 120121443021 in words is "one hundred twenty billion, one hundred twenty-one million, four hundred forty-three thousand, twenty-one".