1202211110021 has 2 divisors, whose sum is σ = 1202211110022. Its totient is φ = 1202211110020.

The previous prime is 1202211110017. The next prime is 1202211110029. The reversal of 1202211110021 is 1200111122021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1143806721121 + 58404388900 = 1069489^2 + 241670^2 .

It is a cyclic number.

It is not a de Polignac number, because 1202211110021 - 2² = 1202211110017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1202211109978 and 1202211110005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1202211110029) 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 as a sum of consecutive naturals, namely, 601105555010 + 601105555011.

It is an arithmetic number, because the mean of its divisors is an integer number (601105555011).

Almost surely, 2^{1202211110021} is an apocalyptic number.

It is an amenable number.

1202211110021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202211110021 is an equidigital number, since it uses as much as digits as its factorization.

1202211110021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1202211110021 its reverse (1200111122021), we get a palindrome (2402322232042).

The spelling of 1202211110021 in words is "one trillion, two hundred two billion, two hundred eleven million, one hundred ten thousand, twenty-one".