2011111221021 has 8 divisors (see below), whose sum is σ = 3064550432064. Its totient is φ = 1149206412000.

The previous prime is 2011111220957. The next prime is 2011111221101. The reversal of 2011111221021 is 1201221111102.

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 2011111221021 - 2⁶ = 2011111220957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011111229021) 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, 47883600480 + ... + 47883600521.

It is an arithmetic number, because the mean of its divisors is an integer number (383068804008).

Almost surely, 2^{2011111221021} is an apocalyptic number.

2011111221021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2011111221021 is a deficient number, since it is larger than the sum of its proper divisors (1053439211043).

2011111221021 is an equidigital number, since it uses as much as digits as its factorization.

2011111221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95767201011.

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

Adding to 2011111221021 its reverse (1201221111102), we get a palindrome (3212332332123).

The spelling of 2011111221021 in words is "two trillion, eleven billion, one hundred eleven million, two hundred twenty-one thousand, twenty-one".