2011121021121 has 8 divisors (see below), whose sum is σ = 2707528624320. Its totient is φ = 1327730382672.

The previous prime is 2011121021113. The next prime is 2011121021149. The reversal of 2011121021121 is 1211201211102.

It is a happy number.

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

It is not a de Polignac number, because 2011121021121 - 2³ = 2011121021113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2011121021121.

It is not an unprimeable number, because it can be changed into a prime (2011121021521) 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, 3254240826 + ... + 3254241443.

It is an arithmetic number, because the mean of its divisors is an integer number (338441078040).

Almost surely, 2^{2011121021121} is an apocalyptic number.

It is an amenable number.

2011121021121 is a deficient number, since it is larger than the sum of its proper divisors (696407603199).

2011121021121 is a wasteful number, since it uses less digits than its factorization.

2011121021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6508482375.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 2011121021121 its reverse (1211201211102), we get a palindrome (3222322232223).

The spelling of 2011121021121 in words is "two trillion, eleven billion, one hundred twenty-one million, twenty-one thousand, one hundred twenty-one".