611121101 has 2 divisors, whose sum is σ = 611121102. Its totient is φ = 611121100.

The previous prime is 611121061. The next prime is 611121103. The reversal of 611121101 is 101121116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 570493225 + 40627876 = 23885^2 + 6374^2 .

It is a cyclic number.

It is not a de Polignac number, because 611121101 - 2⁶ = 611121037 is a prime.

Together with 611121103, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (611121103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305560550 + 305560551.

It is an arithmetic number, because the mean of its divisors is an integer number (305560551).

Almost surely, 2^611121101 is an apocalyptic number.

It is an amenable number.

611121101 is a deficient number, since it is larger than the sum of its proper divisors (1).

611121101 is an equidigital number, since it uses as much as digits as its factorization.

611121101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 14.

The square root of 611121101 is about 24720.8636782779. The cubic root of 611121101 is about 848.6118523379.

Adding to 611121101 its reverse (101121116), we get a palindrome (712242217).

The spelling of 611121101 in words is "six hundred eleven million, one hundred twenty-one thousand, one hundred one".