120121671021 has 32 divisors (see below), whose sum is σ = 176767019520. Its totient is φ = 71954049600.

The previous prime is 120121670957. The next prime is 120121671031. The reversal of 120121671021 is 120176121021.

It is not a de Polignac number, because 120121671021 - 2⁶ = 120121670957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120121670982 and 120121671000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120121671031) 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, 911910 + ... + 1035288.

It is an arithmetic number, because the mean of its divisors is an integer number (5523969360).

Almost surely, 2^120121671021 is an apocalyptic number.

120121671021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

120121671021 is a deficient number, since it is larger than the sum of its proper divisors (56645348499).

120121671021 is a wasteful number, since it uses less digits than its factorization.

120121671021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123737.

The product of its (nonzero) digits is 336, while the sum is 24.

Adding to 120121671021 its reverse (120176121021), we get a palindrome (240297792042).

The spelling of 120121671021 in words is "one hundred twenty billion, one hundred twenty-one million, six hundred seventy-one thousand, twenty-one".