1202111131021 has 2 divisors, whose sum is σ = 1202111131022. Its totient is φ = 1202111131020.

The previous prime is 1202111131009. The next prime is 1202111131063. The reversal of 1202111131021 is 1201311112021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 888890696100 + 313220434921 = 942810^2 + 559661^2 .

It is a cyclic number.

It is not a de Polignac number, because 1202111131021 - 2¹¹ = 1202111128973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1202111130986 and 1202111131004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1202111131421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601055565510 + 601055565511.

It is an arithmetic number, because the mean of its divisors is an integer number (601055565511).

Almost surely, 2^{1202111131021} is an apocalyptic number.

It is an amenable number.

1202111131021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202111131021 is an equidigital number, since it uses as much as digits as its factorization.

1202111131021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 1202111131021 its reverse (1201311112021), we get a palindrome (2403422243042).

The spelling of 1202111131021 in words is "one trillion, two hundred two billion, one hundred eleven million, one hundred thirty-one thousand, twenty-one".