120021120001 has 4 divisors (see below), whose sum is σ = 120383721904. Its totient is φ = 119658518100.

The previous prime is 120021119987. The next prime is 120021120013. The reversal of 120021120001 is 100021120021.

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: 100021120021 = 31547 ⋅3170543.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120021120001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 120021120001.

It is not an unprimeable number, because it can be changed into a prime (120021120061) 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, 181300455 + ... + 181301116.

It is an arithmetic number, because the mean of its divisors is an integer number (30095930476).

Almost surely, 2^120021120001 is an apocalyptic number.

It is an amenable number.

120021120001 is a deficient number, since it is larger than the sum of its proper divisors (362601903).

120021120001 is an equidigital number, since it uses as much as digits as its factorization.

120021120001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362601902.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 120021120001 its reverse (100021120021), we get a palindrome (220042240022).

The spelling of 120021120001 in words is "one hundred twenty billion, twenty-one million, one hundred twenty thousand, one".