2111220011121 has 32 divisors (see below), whose sum is σ = 3106410531840. Its totient is φ = 1267442030400.

The previous prime is 2111220011119. The next prime is 2111220011171. The reversal of 2111220011121 is 1211100221112.

It is a happy number.

It is not a de Polignac number, because 2111220011121 - 2¹ = 2111220011119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2111220011121.

It is not an unprimeable number, because it can be changed into a prime (2111220011171) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3200565 + ... + 3803426.

It is an arithmetic number, because the mean of its divisors is an integer number (97075329120).

Almost surely, 2^{2111220011121} is an apocalyptic number.

It is an amenable number.

2111220011121 is a deficient number, since it is larger than the sum of its proper divisors (995190520719).

2111220011121 is a wasteful number, since it uses less digits than its factorization.

2111220011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7004197.

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

Adding to 2111220011121 its reverse (1211100221112), we get a palindrome (3322320232233).

The spelling of 2111220011121 in words is "two trillion, one hundred eleven billion, two hundred twenty million, eleven thousand, one hundred twenty-one".