1011201110021 has 2 divisors, whose sum is σ = 1011201110022. Its totient is φ = 1011201110020.

The previous prime is 1011201109999. The next prime is 1011201110053. The reversal of 1011201110021 is 1200111021101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 957483777121 + 53717332900 = 978511^2 + 231770^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011201110021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1011201109984 and 1011201110011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011201115021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505600555010 + 505600555011.

It is an arithmetic number, because the mean of its divisors is an integer number (505600555011).

Almost surely, 2^{1011201110021} is an apocalyptic number.

It is an amenable number.

1011201110021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011201110021 is an equidigital number, since it uses as much as digits as its factorization.

1011201110021 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 11.

Adding to 1011201110021 its reverse (1200111021101), we get a palindrome (2211312131122).

The spelling of 1011201110021 in words is "one trillion, eleven billion, two hundred one million, one hundred ten thousand, twenty-one".