1221443300131 has 2 divisors, whose sum is σ = 1221443300132. Its totient is φ = 1221443300130.

The previous prime is 1221443300111. The next prime is 1221443300153. The reversal of 1221443300131 is 1310033441221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221443300131 - 2¹⁷ = 1221443169059 is a prime.

It is a super-2 number, since 2×1221443300131² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221443300096 and 1221443300105.

It is not a weakly prime, because it can be changed into another prime (1221443300111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610721650065 + 610721650066.

It is an arithmetic number, because the mean of its divisors is an integer number (610721650066).

Almost surely, 2^{1221443300131} is an apocalyptic number.

1221443300131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221443300131 is an equidigital number, since it uses as much as digits as its factorization.

1221443300131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 1221443300131 its reverse (1310033441221), we get a palindrome (2531476741352).

The spelling of 1221443300131 in words is "one trillion, two hundred twenty-one billion, four hundred forty-three million, three hundred thousand, one hundred thirty-one".