20210101011111 has 48 divisors (see below), whose sum is σ = 30476860092000. Its totient is φ = 11898455712000.

The previous prime is 20210101011101. The next prime is 20210101011151. The reversal of 20210101011111 is 11111010101202.

It is not a de Polignac number, because 20210101011111 - 2¹⁰ = 20210101010087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210101011101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3257236 + ... + 7143513.

It is an arithmetic number, because the mean of its divisors is an integer number (634934585250).

Almost surely, 2^{20210101011111} is an apocalyptic number.

20210101011111 is a deficient number, since it is larger than the sum of its proper divisors (10266759080889).

20210101011111 is a wasteful number, since it uses less digits than its factorization.

20210101011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10400928 (or 10400917 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 20210101011111 its reverse (11111010101202), we get a palindrome (31321111112313).

Subtracting from 20210101011111 its reverse (11111010101202), we obtain a palindrome (9099090909909).

The spelling of 20210101011111 in words is "twenty trillion, two hundred ten billion, one hundred one million, eleven thousand, one hundred eleven".