19021122101 has 2 divisors, whose sum is σ = 19021122102. Its totient is φ = 19021122100.

The previous prime is 19021122089. The next prime is 19021122121. The reversal of 19021122101 is 10122112091.

It is an a-pointer prime, because the next prime (19021122121) can be obtained adding 19021122101 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16659064900 + 2362057201 = 129070^2 + 48601^2 .

It is a cyclic number.

It is not a de Polignac number, because 19021122101 - 2²⁶ = 18954013237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19021122121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9510561050 + 9510561051.

It is an arithmetic number, because the mean of its divisors is an integer number (9510561051).

Almost surely, 2^19021122101 is an apocalyptic number.

It is an amenable number.

19021122101 is a deficient number, since it is larger than the sum of its proper divisors (1).

19021122101 is an equidigital number, since it uses as much as digits as its factorization.

19021122101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 19021122101 its reverse (10122112091), we get a palindrome (29143234192).

The spelling of 19021122101 in words is "nineteen billion, twenty-one million, one hundred twenty-two thousand, one hundred one".