2121020061 has 8 divisors (see below), whose sum is σ = 2835490080. Its totient is φ = 1410281712.

The previous prime is 2121020051. The next prime is 2121020063. The reversal of 2121020061 is 1600201212.

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

It is not a de Polignac number, because 2121020061 - 2⁶ = 2121019997 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2121020061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121020063) 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, 931590 + ... + 933863.

It is an arithmetic number, because the mean of its divisors is an integer number (354436260).

Almost surely, 2^2121020061 is an apocalyptic number.

It is an amenable number.

2121020061 is a deficient number, since it is larger than the sum of its proper divisors (714470019).

2121020061 is a wasteful number, since it uses less digits than its factorization.

2121020061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1865835.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 2121020061 is about 46054.5335553407. The cubic root of 2121020061 is about 1284.8376628285.

Adding to 2121020061 its reverse (1600201212), we get a palindrome (3721221273).

The spelling of 2121020061 in words is "two billion, one hundred twenty-one million, twenty thousand, sixty-one".