20101021002111 has 16 divisors (see below), whose sum is σ = 30649046457600. Its totient is φ = 11479203009408.

The previous prime is 20101021002071. The next prime is 20101021002133. The reversal of 20101021002111 is 11120012010102.

It is not a de Polignac number, because 20101021002111 - 2¹⁸ = 20101020739967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101021002151) 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, 295577946 + ... + 295645943.

It is an arithmetic number, because the mean of its divisors is an integer number (1915565403600).

Almost surely, 2^{20101021002111} is an apocalyptic number.

20101021002111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20101021002111 is a deficient number, since it is larger than the sum of its proper divisors (10548025455489).

20101021002111 is a wasteful number, since it uses less digits than its factorization.

20101021002111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591225518.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20101021002111 its reverse (11120012010102), we get a palindrome (31221033012213).

The spelling of 20101021002111 in words is "twenty trillion, one hundred one billion, twenty-one million, two thousand, one hundred eleven".