20113111132121 has 16 divisors (see below), whose sum is σ = 23145318804480. Its totient is φ = 17120695885200.

The previous prime is 20113111132099. The next prime is 20113111132141. The reversal of 20113111132121 is 12123111131102.

It is a cyclic number.

It is not a de Polignac number, because 20113111132121 - 2²² = 20113106937817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20113111132093 and 20113111132102.

It is not an unprimeable number, because it can be changed into a prime (20113111132141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 920390 + ... + 6408848.

It is an arithmetic number, because the mean of its divisors is an integer number (1446582425280).

Almost surely, 2^{20113111132121} is an apocalyptic number.

It is an amenable number.

20113111132121 is a deficient number, since it is larger than the sum of its proper divisors (3032207672359).

20113111132121 is a wasteful number, since it uses less digits than its factorization.

20113111132121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5492084.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 20113111132121 its reverse (12123111131102), we get a palindrome (32236222263223).

The spelling of 20113111132121 in words is "twenty trillion, one hundred thirteen billion, one hundred eleven million, one hundred thirty-two thousand, one hundred twenty-one".