11611057421 has 2 divisors, whose sum is σ = 11611057422. Its totient is φ = 11611057420.

The previous prime is 11611057417. The next prime is 11611057429. The reversal of 11611057421 is 12475011611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11536908100 + 74149321 = 107410^2 + 8611^2 .

It is a cyclic number.

It is not a de Polignac number, because 11611057421 - 2² = 11611057417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11611057429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5805528710 + 5805528711.

It is an arithmetic number, because the mean of its divisors is an integer number (5805528711).

Almost surely, 2^11611057421 is an apocalyptic number.

It is an amenable number.

11611057421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11611057421 is an equidigital number, since it uses as much as digits as its factorization.

11611057421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 29.

The spelling of 11611057421 in words is "eleven billion, six hundred eleven million, fifty-seven thousand, four hundred twenty-one".