20101010101121 has 16 divisors (see below), whose sum is σ = 21891559286400. Its totient is φ = 18383899968000.

The previous prime is 20101010101097. The next prime is 20101010101129. The reversal of 20101010101121 is 12110101010102.

It is a cyclic number.

It is not a de Polignac number, because 20101010101121 - 2¹⁰ = 20101010100097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20101010101129) 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, 1569041 + ... + 6531761.

It is an arithmetic number, because the mean of its divisors is an integer number (1368222455400).

Almost surely, 2^{20101010101121} is an apocalyptic number.

It is an amenable number.

20101010101121 is a deficient number, since it is larger than the sum of its proper divisors (1790549185279).

20101010101121 is a wasteful number, since it uses less digits than its factorization.

20101010101121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4970120.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 20101010101121 its reverse (12110101010102), we get a palindrome (32211111111223).

The spelling of 20101010101121 in words is "twenty trillion, one hundred one billion, ten million, one hundred one thousand, one hundred twenty-one".