20101021202011 has 16 divisors (see below), whose sum is σ = 21320400916800. Its totient is φ = 18885753169920.

The previous prime is 20101021201981. The next prime is 20101021202111. The reversal of 20101021202011 is 11020212010102.

It is a cyclic number.

It is not a de Polignac number, because 20101021202011 - 2²⁹ = 20100484331099 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20101021201982 and 20101021202000.

It is not an unprimeable number, because it can be changed into a prime (20101021202111) 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, 173470585 + ... + 173586421.

It is an arithmetic number, because the mean of its divisors is an integer number (1332525057300).

Almost surely, 2^{20101021202011} is an apocalyptic number.

20101021202011 is a deficient number, since it is larger than the sum of its proper divisors (1219379714789).

20101021202011 is a wasteful number, since it uses less digits than its factorization.

20101021202011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133494.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20101021202011 its reverse (11020212010102), we get a palindrome (31121233212113).

The spelling of 20101021202011 in words is "twenty trillion, one hundred one billion, twenty-one million, two hundred two thousand, eleven".