20100011210001 has 12 divisors (see below), whose sum is σ = 29195547011280. Its totient is φ = 13325147095320.

The previous prime is 20100011209961. The next prime is 20100011210023. The reversal of 20100011210001 is 10001211000102.

It is a happy number.

It is not a de Polignac number, because 20100011210001 - 2⁶ = 20100011209937 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 (20100011210051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6238363135 + ... + 6238366356.

It is an arithmetic number, because the mean of its divisors is an integer number (2432962250940).

Almost surely, 2^{20100011210001} is an apocalyptic number.

It is an amenable number.

20100011210001 is a deficient number, since it is larger than the sum of its proper divisors (9095535801279).

20100011210001 is a wasteful number, since it uses less digits than its factorization.

20100011210001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12476729676 (or 12476729673 counting only the distinct ones).

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

Adding to 20100011210001 its reverse (10001211000102), we get a palindrome (30101222210103).

The spelling of 20100011210001 in words is "twenty trillion, one hundred billion, eleven million, two hundred ten thousand, one".