20111001121 has 2 divisors, whose sum is σ = 20111001122. Its totient is φ = 20111001120.

The previous prime is 20111001109. The next prime is 20111001133. The reversal of 20111001121 is 12110011102.

It is a balanced prime because it is at equal distance from previous prime (20111001109) and next prime (20111001133).

It can be written as a sum of positive squares in only one way, i.e., 18923854096 + 1187147025 = 137564^2 + 34455^2 .

It is a cyclic number.

It is not a de Polignac number, because 20111001121 - 2¹⁷ = 20110870049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20111001098 and 20111001107.

It is not a weakly prime, because it can be changed into another prime (20111001151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055500560 + 10055500561.

It is an arithmetic number, because the mean of its divisors is an integer number (10055500561).

Almost surely, 2^20111001121 is an apocalyptic number.

It is an amenable number.

20111001121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20111001121 is an equidigital number, since it uses as much as digits as its factorization.

20111001121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 20111001121 its reverse (12110011102), we get a palindrome (32221012223).

The spelling of 20111001121 in words is "twenty billion, one hundred eleven million, one thousand, one hundred twenty-one".