1002111010121 has 8 divisors (see below), whose sum is σ = 1081835100360. Its totient is φ = 922763866752.

The previous prime is 1002111010027. The next prime is 1002111010123. The reversal of 1002111010121 is 1210101112001.

It can be written as a sum of positive squares in 4 ways, for example, as 463677921721 + 538433088400 = 680939^2 + 733780^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1002111010121 - 2²² = 1002106815817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1002111010123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94231190 + ... + 94241823.

It is an arithmetic number, because the mean of its divisors is an integer number (135229387545).

Almost surely, 2^{1002111010121} is an apocalyptic number.

It is an amenable number.

1002111010121 is a deficient number, since it is larger than the sum of its proper divisors (79724090239).

1002111010121 is a wasteful number, since it uses less digits than its factorization.

1002111010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188473435.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1002111010121 its reverse (1210101112001), we get a palindrome (2212212122122).

The spelling of 1002111010121 in words is "one trillion, two billion, one hundred eleven million, ten thousand, one hundred twenty-one".