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1001211220987 is a prime number
BaseRepresentation
bin11101001000111001101…
…01101101001111111011
310112201022010112211022121
432210130311231033323
5112400440033032422
62043541115102111
7132222642650365
oct16443465551773
93481263484277
101001211220987
1135667a6a617a
1214205b741937
137354c1bb553
143665d257d35
151b09cc6b8c7
hexe91cd6d3fb

1001211220987 has 2 divisors, whose sum is σ = 1001211220988. Its totient is φ = 1001211220986.

The previous prime is 1001211220943. The next prime is 1001211221033. The reversal of 1001211220987 is 7890221121001.

It is a weak prime.

It is an emirp because it is prime and its reverse (7890221121001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1001211220987 - 223 = 1001202832379 is a prime.

It is not a weakly prime, because it can be changed into another prime (1001211220907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500605610493 + 500605610494.

It is an arithmetic number, because the mean of its divisors is an integer number (500605610494).

Almost surely, 21001211220987 is an apocalyptic number.

1001211220987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001211220987 is an equidigital number, since it uses as much as digits as its factorization.

1001211220987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 34.

Adding to 1001211220987 its reverse (7890221121001), we get a palindrome (8891432341988).

The spelling of 1001211220987 in words is "one trillion, one billion, two hundred eleven million, two hundred twenty thousand, nine hundred eighty-seven".