2111021021121 has 16 divisors (see below), whose sum is σ = 2818278852480. Its totient is φ = 1405555544960.

The previous prime is 2111021021101. The next prime is 2111021021143. The reversal of 2111021021121 is 1211201201112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2111021021121 - 2¹¹ = 2111021019073 is a prime.

It is a super-2 number, since 2×2111021021121² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2111021021121.

It is not an unprimeable number, because it can be changed into a prime (2111021021101) 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, 40429651 + ... + 40481831.

It is an arithmetic number, because the mean of its divisors is an integer number (176142428280).

Almost surely, 2^{2111021021121} is an apocalyptic number.

It is an amenable number.

2111021021121 is a deficient number, since it is larger than the sum of its proper divisors (707257831359).

2111021021121 is a wasteful number, since it uses less digits than its factorization.

2111021021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69096.

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

Adding to 2111021021121 its reverse (1211201201112), we get a palindrome (3322222222233).

The spelling of 2111021021121 in words is "two trillion, one hundred eleven billion, twenty-one million, twenty-one thousand, one hundred twenty-one".