1303212212021 has 2 divisors, whose sum is σ = 1303212212022. Its totient is φ = 1303212212020.

The previous prime is 1303212212017. The next prime is 1303212212023. The reversal of 1303212212021 is 1202122123031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 787816008100 + 515396203921 = 887590^2 + 717911^2 .

It is a cyclic number.

It is not a de Polignac number, because 1303212212021 - 2² = 1303212212017 is a prime.

Together with 1303212212023, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1303212211984 and 1303212212002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1303212212023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 651606106010 + 651606106011.

It is an arithmetic number, because the mean of its divisors is an integer number (651606106011).

Almost surely, 2^{1303212212021} is an apocalyptic number.

It is an amenable number.

1303212212021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1303212212021 is an equidigital number, since it uses as much as digits as its factorization.

1303212212021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1303212212021 its reverse (1202122123031), we get a palindrome (2505334335052).

The spelling of 1303212212021 in words is "one trillion, three hundred three billion, two hundred twelve million, two hundred twelve thousand, twenty-one".