210111112010121 has 16 divisors (see below), whose sum is σ = 320169547905024. Its totient is φ = 120063404690064.

The previous prime is 210111112010119. The next prime is 210111112010171. The reversal of 210111112010121 is 121010211111012.

210111112010121 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 210111112010121 - 2¹ = 210111112010119 is a prime.

It is a super-2 number, since 2×210111112010121² (a number of 29 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 210111112010121.

It is not an unprimeable number, because it can be changed into a prime (210111112010171) 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, 35398870 + ... + 40906016.

It is an arithmetic number, because the mean of its divisors is an integer number (20010596744064).

Almost surely, 2^{210111112010121} is an apocalyptic number.

210111112010121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

210111112010121 is a deficient number, since it is larger than the sum of its proper divisors (110058435894903).

210111112010121 is a wasteful number, since it uses less digits than its factorization.

210111112010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7323940.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 210111112010121 its reverse (121010211111012), we get a palindrome (331121323121133).

The spelling of 210111112010121 in words is "two hundred ten trillion, one hundred eleven billion, one hundred twelve million, ten thousand, one hundred twenty-one".