1021002201077 has 2 divisors, whose sum is σ = 1021002201078. Its totient is φ = 1021002201076.

The previous prime is 1021002201049. The next prime is 1021002201133. The reversal of 1021002201077 is 7701022001201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 952353484996 + 68648716081 = 975886^2 + 262009^2 .

It is an emirp because it is prime and its reverse (7701022001201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1021002201077 - 2⁸ = 1021002200821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021002201377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510501100538 + 510501100539.

It is an arithmetic number, because the mean of its divisors is an integer number (510501100539).

Almost surely, 2^{1021002201077} is an apocalyptic number.

It is an amenable number.

1021002201077 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021002201077 is an equidigital number, since it uses as much as digits as its factorization.

1021002201077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 392, while the sum is 23.

Adding to 1021002201077 its reverse (7701022001201), we get a palindrome (8722024202278).

The spelling of 1021002201077 in words is "one trillion, twenty-one billion, two million, two hundred one thousand, seventy-seven".