20000111001201 has 24 divisors (see below), whose sum is σ = 29673864282920. Its totient is φ = 12971282893056.

The previous prime is 20000111001181. The next prime is 20000111001251. The reversal of 20000111001201 is 10210011100002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 15433512959601 + 4566598041600 = 3928551^2 + 2136960^2 .

It is not a de Polignac number, because 20000111001201 - 2²¹ = 20000108904049 is a prime.

It is a super-2 number, since 2×20000111001201² (a number of 27 digits) contains 22 as substring.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20000111001251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1621330 + ... + 6529083.

Almost surely, 2^{20000111001201} is an apocalyptic number.

It is an amenable number.

20000111001201 is a deficient number, since it is larger than the sum of its proper divisors (9673753281719).

20000111001201 is a wasteful number, since it uses less digits than its factorization.

20000111001201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8157825 (or 8157822 counting only the distinct ones).

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

Adding to 20000111001201 its reverse (10210011100002), we get a palindrome (30210122101203).

The spelling of 20000111001201 in words is "twenty trillion, one hundred eleven million, one thousand, two hundred one".