11211993101 has 2 divisors, whose sum is σ = 11211993102. Its totient is φ = 11211993100.

The previous prime is 11211993097. The next prime is 11211993203. The reversal of 11211993101 is 10139911211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11209515625 + 2477476 = 105875^2 + 1574^2 .

It is an emirp because it is prime and its reverse (10139911211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11211993101 - 2² = 11211993097 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11211993301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605996550 + 5605996551.

It is an arithmetic number, because the mean of its divisors is an integer number (5605996551).

Almost surely, 2^11211993101 is an apocalyptic number.

It is an amenable number.

11211993101 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211993101 is an equidigital number, since it uses as much as digits as its factorization.

11211993101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 29.

The spelling of 11211993101 in words is "eleven billion, two hundred eleven million, nine hundred ninety-three thousand, one hundred one".