2211121101021 has 48 divisors (see below), whose sum is σ = 3495291403968. Its totient is φ = 1239271488000.

The previous prime is 2211121100987. The next prime is 2211121101031. The reversal of 2211121101021 is 1201011211122.

It is a happy number.

It is not a de Polignac number, because 2211121101021 - 2⁶ = 2211121100957 is a prime.

It is a super-3 number, since 3×2211121101021³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211121101031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25909221 + ... + 25994421.

It is an arithmetic number, because the mean of its divisors is an integer number (72818570916).

Almost surely, 2^{2211121101021} is an apocalyptic number.

2211121101021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2211121101021 is a deficient number, since it is larger than the sum of its proper divisors (1284170302947).

2211121101021 is a wasteful number, since it uses less digits than its factorization.

2211121101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88602 (or 88595 counting only the distinct ones).

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

Adding to 2211121101021 its reverse (1201011211122), we get a palindrome (3412132312143).

The spelling of 2211121101021 in words is "two trillion, two hundred eleven billion, one hundred twenty-one million, one hundred one thousand, twenty-one".