102201210021091 has 4 divisors (see below), whose sum is σ = 102208680337384. Its totient is φ = 102193739704800.

The previous prime is 102201210021061. The next prime is 102201210021107. The reversal of 102201210021091 is 190120012102201.

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 102201210021091 - 2⁵ = 102201210021059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102201210021061) 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, 3735137625 + ... + 3735164986.

It is an arithmetic number, because the mean of its divisors is an integer number (25552170084346).

Almost surely, 2^{102201210021091} is an apocalyptic number.

102201210021091 is a deficient number, since it is larger than the sum of its proper divisors (7470316293).

102201210021091 is an equidigital number, since it uses as much as digits as its factorization.

102201210021091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7470316292.

The product of its (nonzero) digits is 144, while the sum is 22.

Adding to 102201210021091 its reverse (190120012102201), we get a palindrome (292321222123292).

The spelling of 102201210021091 in words is "one hundred two trillion, two hundred one billion, two hundred ten million, twenty-one thousand, ninety-one".