1002111010921 has 2 divisors, whose sum is σ = 1002111010922. Its totient is φ = 1002111010920.

The previous prime is 1002111010913. The next prime is 1002111011059. The reversal of 1002111010921 is 1290101112001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 992791039321 + 9319971600 = 996389^2 + 96540^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002111010921 - 2³ = 1002111010913 is a prime.

It is not a weakly prime, because it can be changed into another prime (1002111011921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501055505460 + 501055505461.

It is an arithmetic number, because the mean of its divisors is an integer number (501055505461).

Almost surely, 2^{1002111010921} is an apocalyptic number.

It is an amenable number.

1002111010921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002111010921 is an equidigital number, since it uses as much as digits as its factorization.

1002111010921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 19.

Adding to 1002111010921 its reverse (1290101112001), we get a palindrome (2292212122922).

The spelling of 1002111010921 in words is "one trillion, two billion, one hundred eleven million, ten thousand, nine hundred twenty-one".