2101220001121 has 8 divisors (see below), whose sum is σ = 2108898800424. Its totient is φ = 2093541872640.

The previous prime is 2101220001091. The next prime is 2101220001131. The reversal of 2101220001121 is 1211000221012.

It can be written as a sum of positive squares in 4 ways, for example, as 201640000 + 2101018361121 = 14200^2 + 1449489^2 .

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 2101220001121 - 2¹⁹ = 2101219476833 is a prime.

It is a super-2 number, since 2×2101220001121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2101220001131) 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, 6607041 + ... + 6917761.

It is an arithmetic number, because the mean of its divisors is an integer number (263612350053).

Almost surely, 2^{2101220001121} is an apocalyptic number.

It is an amenable number.

2101220001121 is a deficient number, since it is larger than the sum of its proper divisors (7678799303).

2101220001121 is a wasteful number, since it uses less digits than its factorization.

2101220001121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335411.

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

Adding to 2101220001121 its reverse (1211000221012), we get a palindrome (3312220222133).

The spelling of 2101220001121 in words is "two trillion, one hundred one billion, two hundred twenty million, one thousand, one hundred twenty-one".