20001011021201 has 16 divisors (see below), whose sum is σ = 23465601867264. Its totient is φ = 16692025964544.

The previous prime is 20001011021183. The next prime is 20001011021231. The reversal of 20001011021201 is 10212011010002.

It is not a de Polignac number, because 20001011021201 - 2³⁸ = 19726133114257 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 (20001011021231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157432220 + ... + 157559213.

It is an arithmetic number, because the mean of its divisors is an integer number (1466600116704).

Almost surely, 2^{20001011021201} is an apocalyptic number.

It is an amenable number.

20001011021201 is a deficient number, since it is larger than the sum of its proper divisors (3464590846063).

20001011021201 is a wasteful number, since it uses less digits than its factorization.

20001011021201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314991680.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20001011021201 its reverse (10212011010002), we get a palindrome (30213022031203).

The spelling of 20001011021201 in words is "twenty trillion, one billion, eleven million, twenty-one thousand, two hundred one".