101211111021111 has 64 divisors (see below), whose sum is σ = 170590366722048. Its totient is φ = 51939736386048.

The previous prime is 101211111021089. The next prime is 101211111021113. The reversal of 101211111021111 is 111120111112101.

It is a happy number.

It is not a de Polignac number, because 101211111021111 - 2¹⁷ = 101211110890039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101211111021113) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 154086261 + ... + 154741713.

It is an arithmetic number, because the mean of its divisors is an integer number (2665474480032).

Almost surely, 2^{101211111021111} is an apocalyptic number.

101211111021111 is a deficient number, since it is larger than the sum of its proper divisors (69379255700937).

101211111021111 is a wasteful number, since it uses less digits than its factorization.

101211111021111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670800.

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

Adding to 101211111021111 its reverse (111120111112101), we get a palindrome (212331222133212).

The spelling of 101211111021111 in words is "one hundred one trillion, two hundred eleven billion, one hundred eleven million, twenty-one thousand, one hundred eleven".