2011021120121 has 8 divisors (see below), whose sum is σ = 2166062822280. Its totient is φ = 1856029099392.

The previous prime is 2011021120117. The next prime is 2011021120139. The reversal of 2011021120121 is 1210211201102.

It can be written as a sum of positive squares in 4 ways, for example, as 101083300096 + 1909937820025 = 317936^2 + 1382005^2 .

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

It is not a de Polignac number, because 2011021120121 - 2² = 2011021120117 is a prime.

It is a super-2 number, since 2×2011021120121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011021120096 and 2011021120105.

It is not an unprimeable number, because it can be changed into a prime (2011021120151) 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, 12336260 + ... + 12498213.

It is an arithmetic number, because the mean of its divisors is an integer number (270757852785).

Almost surely, 2^{2011021120121} is an apocalyptic number.

It is an amenable number.

2011021120121 is a deficient number, since it is larger than the sum of its proper divisors (155041702159).

2011021120121 is a wasteful number, since it uses less digits than its factorization.

2011021120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24840715.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2011021120121 its reverse (1210211201102), we get a palindrome (3221232321223).

The spelling of 2011021120121 in words is "two trillion, eleven billion, twenty-one million, one hundred twenty thousand, one hundred twenty-one".