1221110298953 has 2 divisors, whose sum is σ = 1221110298954. Its totient is φ = 1221110298952.

The previous prime is 1221110298949. The next prime is 1221110298959. The reversal of 1221110298953 is 3598920111221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1160764902544 + 60345396409 = 1077388^2 + 245653^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221110298953 - 2² = 1221110298949 is a prime.

It is a super-2 number, since 2×1221110298953² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1221110298959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610555149476 + 610555149477.

It is an arithmetic number, because the mean of its divisors is an integer number (610555149477).

Almost surely, 2^{1221110298953} is an apocalyptic number.

It is an amenable number.

1221110298953 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221110298953 is an equidigital number, since it uses as much as digits as its factorization.

1221110298953 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 44.

The spelling of 1221110298953 in words is "one trillion, two hundred twenty-one billion, one hundred ten million, two hundred ninety-eight thousand, nine hundred fifty-three".