1001210201001 has 6 divisors (see below), whose sum is σ = 1446192512570. Its totient is φ = 667473467328.

The previous prime is 1001210200999. The next prime is 1001210201011. The reversal of 1001210201001 is 1001020121001.

It is a happy number.

1001210201001 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 774181775376 + 227028425625 = 879876^2 + 476475^2 .

It is not a de Polignac number, because 1001210201001 - 2¹ = 1001210200999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 111245577889 = 1001210201001 / (1 + 0 + 0 + 1 + 2 + 1 + 0 + 2 + 0 + 1 + 0 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001210201011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55622788936 + ... + 55622788953.

Almost surely, 2^{1001210201001} is an apocalyptic number.

It is an amenable number.

1001210201001 is a deficient number, since it is larger than the sum of its proper divisors (444982311569).

1001210201001 is a wasteful number, since it uses less digits than its factorization.

1001210201001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111245577895 (or 111245577892 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1001210201001 its reverse (1001020121001), we get a palindrome (2002230322002).

The spelling of 1001210201001 in words is "one trillion, one billion, two hundred ten million, two hundred one thousand, one".