102111100021191 has 16 divisors (see below), whose sum is σ = 138298197246848. Its totient is φ = 67000770064800.

The previous prime is 102111100021181. The next prime is 102111100021193. The reversal of 102111100021191 is 191120001111201.

It is a happy number.

It is not a de Polignac number, because 102111100021191 - 2⁵ = 102111100021159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102111100021193) 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, 216679840 + ... + 217150581.

It is an arithmetic number, because the mean of its divisors is an integer number (8643637327928).

Almost surely, 2^{102111100021191} is an apocalyptic number.

102111100021191 is a deficient number, since it is larger than the sum of its proper divisors (36187097225657).

102111100021191 is a wasteful number, since it uses less digits than its factorization.

102111100021191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433831662.

The product of its (nonzero) digits is 36, while the sum is 21.

Adding to 102111100021191 its reverse (191120001111201), we get a palindrome (293231101132392).

The spelling of 102111100021191 in words is "one hundred two trillion, one hundred eleven billion, one hundred million, twenty-one thousand, one hundred ninety-one".