1011201002001 has 32 divisors (see below), whose sum is σ = 1555907875200. Its totient is φ = 648294696000.

The previous prime is 1011201001969. The next prime is 1011201002003. The reversal of 1011201002001 is 1002001021101.

It is a happy number.

It is not a de Polignac number, because 1011201002001 - 2⁵ = 1011201001969 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1011201002003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2376066 + ... + 2769131.

It is an arithmetic number, because the mean of its divisors is an integer number (48622121100).

Almost surely, 2^{1011201002001} is an apocalyptic number.

It is an amenable number.

1011201002001 is a deficient number, since it is larger than the sum of its proper divisors (544706873199).

1011201002001 is a wasteful number, since it uses less digits than its factorization.

1011201002001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5145486 (or 5145480 counting only the distinct ones).

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

Adding to 1011201002001 its reverse (1002001021101), we get a palindrome (2013202023102).

The spelling of 1011201002001 in words is "one trillion, eleven billion, two hundred one million, two thousand, one".