1101021001987 has 2 divisors, whose sum is σ = 1101021001988. Its totient is φ = 1101021001986.

The previous prime is 1101021001943. The next prime is 1101021002051. The reversal of 1101021001987 is 7891001201011.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1101021001987 is a prime.

It is not a weakly prime, because it can be changed into another prime (1101021001907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550510500993 + 550510500994.

It is an arithmetic number, because the mean of its divisors is an integer number (550510500994).

Almost surely, 2^{1101021001987} is an apocalyptic number.

1101021001987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101021001987 is an equidigital number, since it uses as much as digits as its factorization.

1101021001987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 31.

Adding to 1101021001987 its reverse (7891001201011), we get a palindrome (8992022202998).

The spelling of 1101021001987 in words is "one trillion, one hundred one billion, twenty-one million, one thousand, nine hundred eighty-seven".