120101821 has 8 divisors (see below), whose sum is σ = 145333440. Its totient is φ = 96888768.

The previous prime is 120101819. The next prime is 120101857. The reversal of 120101821 is 128101021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 120101821 - 2¹ = 120101819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120101795 and 120101804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120101321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 504511 + ... + 504748.

It is an arithmetic number, because the mean of its divisors is an integer number (18166680).

Almost surely, 2^120101821 is an apocalyptic number.

It is an amenable number.

120101821 is a deficient number, since it is larger than the sum of its proper divisors (25231619).

120101821 is a wasteful number, since it uses less digits than its factorization.

120101821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009283.

The product of its (nonzero) digits is 32, while the sum is 16.

The square root of 120101821 is about 10959.0976362107. The cubic root of 120101821 is about 493.3818821936.

Adding to 120101821 its reverse (128101021), we get a palindrome (248202842).

It can be divided in two parts, 12010 and 1821, that added together give a palindrome (13831).

The spelling of 120101821 in words is "one hundred twenty million, one hundred one thousand, eight hundred twenty-one".