120101020120021 has 8 divisors (see below), whose sum is σ = 127177494683544. Its totient is φ = 113025846520320.

The previous prime is 120101020120007. The next prime is 120101020120057. The reversal of 120101020120021 is 120021020101021.

It can be written as a sum of positive squares in 4 ways, for example, as 47571712700625 + 72529307419396 = 6897225^2 + 8516414^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 120101020120021 - 2³⁷ = 119963581166549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120101020119983 and 120101020120010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120101020120001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 325050880 + ... + 325420153.

It is an arithmetic number, because the mean of its divisors is an integer number (15897186835443).

Almost surely, 2^{120101020120021} is an apocalyptic number.

It is an amenable number.

120101020120021 is a deficient number, since it is larger than the sum of its proper divisors (7076474563523).

120101020120021 is a wasteful number, since it uses less digits than its factorization.

120101020120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650481911.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 120101020120021 its reverse (120021020101021), we get a palindrome (240122040221042).

The spelling of 120101020120021 in words is "one hundred twenty trillion, one hundred one billion, twenty million, one hundred twenty thousand, twenty-one".