1001212011001 has 8 divisors (see below), whose sum is σ = 1007834325120. Its totient is φ = 994597161888.

The previous prime is 1001212010999. The next prime is 1001212011061. The reversal of 1001212011001 is 1001102121001.

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

It is a cyclic number.

It is not a de Polignac number, because 1001212011001 - 2¹ = 1001212010999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001212011061) 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, 1596996 + ... + 2133733.

It is an arithmetic number, because the mean of its divisors is an integer number (125979290640).

Almost surely, 2^{1001212011001} is an apocalyptic number.

It is an amenable number.

1001212011001 is a deficient number, since it is larger than the sum of its proper divisors (6622314119).

1001212011001 is a wasteful number, since it uses less digits than its factorization.

1001212011001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3732503.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1001212011001 its reverse (1001102121001), we get a palindrome (2002314132002).

The spelling of 1001212011001 in words is "one trillion, one billion, two hundred twelve million, eleven thousand, one".