61211119987 has 2 divisors, whose sum is σ = 61211119988. Its totient is φ = 61211119986.

The previous prime is 61211119979. The next prime is 61211119999. The reversal of 61211119987 is 78991111216.

It is a happy number.

61211119987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61211119987 - 2³ = 61211119979 is a prime.

It is not a weakly prime, because it can be changed into another prime (61211119787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30605559993 + 30605559994.

It is an arithmetic number, because the mean of its divisors is an integer number (30605559994).

Almost surely, 2^61211119987 is an apocalyptic number.

61211119987 is a deficient number, since it is larger than the sum of its proper divisors (1).

61211119987 is an equidigital number, since it uses as much as digits as its factorization.

61211119987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 46.

The spelling of 61211119987 in words is "sixty-one billion, two hundred eleven million, one hundred nineteen thousand, nine hundred eighty-seven".