20012101211011 has 32 divisors (see below), whose sum is σ = 24969131042688. Its totient is φ = 15617030860800.

The previous prime is 20012101210957. The next prime is 20012101211041. The reversal of 20012101211011 is 11011210121002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20012101211011 - 2²⁹ = 20011564340099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 20012101210982 and 20012101211000.

It is not an unprimeable number, because it can be changed into a prime (20012101211041) 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, 1282540 + ... + 6455161.

It is an arithmetic number, because the mean of its divisors is an integer number (780285345084).

Almost surely, 2^{20012101211011} is an apocalyptic number.

20012101211011 is a deficient number, since it is larger than the sum of its proper divisors (4957029831677).

20012101211011 is a wasteful number, since it uses less digits than its factorization.

20012101211011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7738111.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20012101211011 its reverse (11011210121002), we get a palindrome (31023311332013).

The spelling of 20012101211011 in words is "twenty trillion, twelve billion, one hundred one million, two hundred eleven thousand, eleven".