2011211120121 has 16 divisors (see below), whose sum is σ = 3066273558528. Its totient is φ = 1148674410000.

The previous prime is 2011211120117. The next prime is 2011211120147. The reversal of 2011211120121 is 1210211121102.

It is a happy number.

It is not a de Polignac number, because 2011211120121 - 2² = 2011211120117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2011211120121.

It is not an unprimeable number, because it can be changed into a prime (2011211120101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24503355 + ... + 24585296.

It is an arithmetic number, because the mean of its divisors is an integer number (191642097408).

Almost surely, 2^{2011211120121} is an apocalyptic number.

2011211120121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2011211120121 is a deficient number, since it is larger than the sum of its proper divisors (1055062438407).

2011211120121 is a wasteful number, since it uses less digits than its factorization.

2011211120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49090612.

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

Adding to 2011211120121 its reverse (1210211121102), we get a palindrome (3221422241223).

The spelling of 2011211120121 in words is "two trillion, eleven billion, two hundred eleven million, one hundred twenty thousand, one hundred twenty-one".