210101111121111 has 8 divisors (see below), whose sum is σ = 320154074089344. Its totient is φ = 120057777783480.

The previous prime is 210101111121091. The next prime is 210101111121113. The reversal of 210101111121111 is 111121111101012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 210101111121111 - 2³⁴ = 210083931251927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210101111121113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5002407407625 + ... + 5002407407666.

It is an arithmetic number, because the mean of its divisors is an integer number (40019259261168).

Almost surely, 2^{210101111121111} is an apocalyptic number.

210101111121111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

210101111121111 is a deficient number, since it is larger than the sum of its proper divisors (110052962968233).

210101111121111 is a wasteful number, since it uses less digits than its factorization.

210101111121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10004814815301.

The product of its (nonzero) digits is 4, while the sum is 15.

Adding to 210101111121111 its reverse (111121111101012), we get a palindrome (321222222222123).

The spelling of 210101111121111 in words is "two hundred ten trillion, one hundred one billion, one hundred eleven million, one hundred twenty-one thousand, one hundred eleven".