102021211112111 has 4 divisors (see below), whose sum is σ = 102610929095592. Its totient is φ = 101431493128632.

The previous prime is 102021211112083. The next prime is 102021211112167. The reversal of 102021211112111 is 111211112120201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102021211112111 - 2¹⁸ = 102021210849967 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102021211112111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021201112111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 294858991481 + ... + 294858991826.

It is an arithmetic number, because the mean of its divisors is an integer number (25652732273898).

Almost surely, 2^{102021211112111} is an apocalyptic number.

102021211112111 is a deficient number, since it is larger than the sum of its proper divisors (589717983481).

102021211112111 is an equidigital number, since it uses as much as digits as its factorization.

102021211112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589717983480.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 102021211112111 its reverse (111211112120201), we get a palindrome (213232323232312).

The spelling of 102021211112111 in words is "one hundred two trillion, twenty-one billion, two hundred eleven million, one hundred twelve thousand, one hundred eleven".