2111210110021 has 16 divisors (see below), whose sum is σ = 2178115213824. Its totient is φ = 2045321201664.

The previous prime is 2111210109973. The next prime is 2111210110043. The reversal of 2111210110021 is 1200110121112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2111210110021 - 2¹¹ = 2111210107973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111210109983 and 2111210110010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111210113021) 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, 1396741 + ... + 2484613.

It is an arithmetic number, because the mean of its divisors is an integer number (136132200864).

Almost surely, 2^{2111210110021} is an apocalyptic number.

It is an amenable number.

2111210110021 is a deficient number, since it is larger than the sum of its proper divisors (66905103803).

2111210110021 is a wasteful number, since it uses less digits than its factorization.

2111210110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1088340.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 2111210110021 its reverse (1200110121112), we get a palindrome (3311320231133).

The spelling of 2111210110021 in words is "two trillion, one hundred eleven billion, two hundred ten million, one hundred ten thousand, twenty-one".