2121020021101 has 8 divisors (see below), whose sum is σ = 2213652023424. Its totient is φ = 2028422497200.

The previous prime is 2121020021077. The next prime is 2121020021123. The reversal of 2121020021101 is 1011200201212.

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 2121020021101 - 2¹⁵ = 2121019988333 is a prime.

It is a super-2 number, since 2×2121020021101² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121020021171) 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, 8493846 + ... + 8739991.

It is an arithmetic number, because the mean of its divisors is an integer number (276706502928).

Almost surely, 2^{2121020021101} is an apocalyptic number.

It is an amenable number.

2121020021101 is a deficient number, since it is larger than the sum of its proper divisors (92632002323).

2121020021101 is a wasteful number, since it uses less digits than its factorization.

2121020021101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17239211.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2121020021101 its reverse (1011200201212), we get a palindrome (3132220222313).

The spelling of 2121020021101 in words is "two trillion, one hundred twenty-one billion, twenty million, twenty-one thousand, one hundred one".