120020212121 has 4 divisors (see below), whose sum is σ = 121987756644. Its totient is φ = 118052667600.

The previous prime is 120020212079. The next prime is 120020212163. The reversal of 120020212121 is 121212020021.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (120020212079) and next prime (120020212163).

It can be written as a sum of positive squares in 2 ways, for example, as 10584294400 + 109435917721 = 102880^2 + 330811^2 .

It is a cyclic number.

It is not a de Polignac number, because 120020212121 - 2³⁰ = 118946470297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120020212096 and 120020212105.

It is not an unprimeable number, because it can be changed into a prime (120020212171) 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, 983772170 + ... + 983772291.

It is an arithmetic number, because the mean of its divisors is an integer number (30496939161).

Almost surely, 2^120020212121 is an apocalyptic number.

It is an amenable number.

120020212121 is a deficient number, since it is larger than the sum of its proper divisors (1967544523).

120020212121 is an equidigital number, since it uses as much as digits as its factorization.

120020212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1967544522.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 120020212121 its reverse (121212020021), we get a palindrome (241232232142).

The spelling of 120020212121 in words is "one hundred twenty billion, twenty million, two hundred twelve thousand, one hundred twenty-one".