20002111020111 has 24 divisors (see below), whose sum is σ = 30705834513024. Its totient is φ = 11484465650640.

The previous prime is 20002111020107. The next prime is 20002111020121. The reversal of 20002111020111 is 11102011120002.

It is not a de Polignac number, because 20002111020111 - 2² = 20002111020107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002111020121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 839495811 + ... + 839519636.

It is an arithmetic number, because the mean of its divisors is an integer number (1279409771376).

Almost surely, 2^{20002111020111} is an apocalyptic number.

20002111020111 is a deficient number, since it is larger than the sum of its proper divisors (10703723492913).

20002111020111 is a wasteful number, since it uses less digits than its factorization.

20002111020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1679015499 (or 1679015480 counting only the distinct ones).

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

Adding to 20002111020111 its reverse (11102011120002), we get a palindrome (31104122140113).

It can be divided in two parts, 20002 and 111020111, that multiplied together give a palindrome (2220624260222).

The spelling of 20002111020111 in words is "twenty trillion, two billion, one hundred eleven million, twenty thousand, one hundred eleven".