20102211012111 has 16 divisors (see below), whose sum is σ = 26808328729728. Its totient is φ = 13398783933600.

The previous prime is 20102211012089. The next prime is 20102211012227. The reversal of 20102211012111 is 11121011220102.

It is a happy number.

It is not a de Polignac number, because 20102211012111 - 2⁷ = 20102211011983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102211012011) 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, 469426081 + ... + 469468901.

It is an arithmetic number, because the mean of its divisors is an integer number (1675520545608).

Almost surely, 2^{20102211012111} is an apocalyptic number.

20102211012111 is a deficient number, since it is larger than the sum of its proper divisors (6706117717617).

20102211012111 is a wasteful number, since it uses less digits than its factorization.

20102211012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70582.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20102211012111 its reverse (11121011220102), we get a palindrome (31223222232213).

The spelling of 20102211012111 in words is "twenty trillion, one hundred two billion, two hundred eleven million, twelve thousand, one hundred eleven".