120000021101 has 4 divisors (see below), whose sum is σ = 120002535804. Its totient is φ = 119997506400.

The previous prime is 120000021079. The next prime is 120000021109. The reversal of 120000021101 is 101120000021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101120000021 = 613 ⋅164959217.

It can be written as a sum of positive squares in 2 ways, for example, as 25953532201 + 94046488900 = 161101^2 + 306670^2 .

It is a cyclic number.

It is not a de Polignac number, because 120000021101 - 2¹⁴ = 120000004717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120000021109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1184360 + ... + 1281681.

It is an arithmetic number, because the mean of its divisors is an integer number (30000633951).

Almost surely, 2^120000021101 is an apocalyptic number.

It is an amenable number.

120000021101 is a deficient number, since it is larger than the sum of its proper divisors (2514703).

120000021101 is an equidigital number, since it uses as much as digits as its factorization.

120000021101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2514702.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 120000021101 its reverse (101120000021), we get a palindrome (221120021122).

It can be divided in two parts, 120000021 and 101, that multiplied together give a palindrome (12120002121).

The spelling of 120000021101 in words is "one hundred twenty billion, twenty-one thousand, one hundred one".