1101111021947 has 2 divisors, whose sum is σ = 1101111021948. Its totient is φ = 1101111021946.

The previous prime is 1101111021919. The next prime is 1101111022001. The reversal of 1101111021947 is 7491201111011.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1101111021947 - 2⁶ = 1101111021883 is a prime.

It is not a weakly prime, because it can be changed into another prime (1101111021547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550555510973 + 550555510974.

It is an arithmetic number, because the mean of its divisors is an integer number (550555510974).

Almost surely, 2^{1101111021947} is an apocalyptic number.

1101111021947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101111021947 is an equidigital number, since it uses as much as digits as its factorization.

1101111021947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 29.

Adding to 1101111021947 its reverse (7491201111011), we get a palindrome (8592312132958).

The spelling of 1101111021947 in words is "one trillion, one hundred one billion, one hundred eleven million, twenty-one thousand, nine hundred forty-seven".