1101221122021 has 2 divisors, whose sum is σ = 1101221122022. Its totient is φ = 1101221122020.

The previous prime is 1101221121997. The next prime is 1101221122051. The reversal of 1101221122021 is 1202211221011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 820491756100 + 280729365921 = 905810^2 + 529839^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101221122021 - 2¹⁷ = 1101220990949 is a prime.

It is a super-2 number, since 2×1101221122021² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1101221121986 and 1101221122004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1101221122051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550610561010 + 550610561011.

It is an arithmetic number, because the mean of its divisors is an integer number (550610561011).

Almost surely, 2^{1101221122021} is an apocalyptic number.

It is an amenable number.

1101221122021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101221122021 is an equidigital number, since it uses as much as digits as its factorization.

1101221122021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1101221122021 its reverse (1202211221011), we get a palindrome (2303432343032).

The spelling of 1101221122021 in words is "one trillion, one hundred one billion, two hundred twenty-one million, one hundred twenty-two thousand, twenty-one".