120213000021 has 4 divisors (see below), whose sum is σ = 160284000032. Its totient is φ = 80142000012.

The previous prime is 120212999957. The next prime is 120213000029. The reversal of 120213000021 is 120000312021.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120000312021 = 3 ⋅40000104007.

It is not a de Polignac number, because 120213000021 - 2⁶ = 120212999957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 120212999970 and 120213000006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120213000029) 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, 20035500001 + ... + 20035500006.

It is an arithmetic number, because the mean of its divisors is an integer number (40071000008).

Almost surely, 2^120213000021 is an apocalyptic number.

It is an amenable number.

120213000021 is a deficient number, since it is larger than the sum of its proper divisors (40071000011).

120213000021 is an equidigital number, since it uses as much as digits as its factorization.

120213000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40071000010.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 120213000021 its reverse (120000312021), we get a palindrome (240213312042).

The spelling of 120213000021 in words is "one hundred twenty billion, two hundred thirteen million, twenty-one", and thus it is an aban number.