20101101210111 has 64 divisors (see below), whose sum is σ = 29478629376000. Its totient is φ = 12136166755200.

The previous prime is 20101101210107. The next prime is 20101101210193. The reversal of 20101101210111 is 11101210110102.

It is not a de Polignac number, because 20101101210111 - 2² = 20101101210107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101101210101) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 65832766 + ... + 66137396.

It is an arithmetic number, because the mean of its divisors is an integer number (460603584000).

Almost surely, 2^{20101101210111} is an apocalyptic number.

20101101210111 is a deficient number, since it is larger than the sum of its proper divisors (9377528165889).

20101101210111 is a wasteful number, since it uses less digits than its factorization.

20101101210111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305140.

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

Adding to 20101101210111 its reverse (11101210110102), we get a palindrome (31202311320213).

The spelling of 20101101210111 in words is "twenty trillion, one hundred one billion, one hundred one million, two hundred ten thousand, one hundred eleven".