120212102121221 has 4 divisors (see below), whose sum is σ = 131140475041344. Its totient is φ = 109283729201100.

The previous prime is 120212102121179. The next prime is 120212102121271. The reversal of 120212102121221 is 122121201212021.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120212102121221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120212102121193 and 120212102121202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120212102121271) 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, 5464186460045 + ... + 5464186460066.

It is an arithmetic number, because the mean of its divisors is an integer number (32785118760336).

Almost surely, 2^{120212102121221} is an apocalyptic number.

120212102121221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

120212102121221 is a deficient number, since it is larger than the sum of its proper divisors (10928372920123).

120212102121221 is a wasteful number, since it uses less digits than its factorization.

120212102121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10928372920122.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 120212102121221 its reverse (122121201212021), we get a palindrome (242333303333242).

The spelling of 120212102121221 in words is "one hundred twenty trillion, two hundred twelve billion, one hundred two million, one hundred twenty-one thousand, two hundred twenty-one".