1221413125411 has 2 divisors, whose sum is σ = 1221413125412. Its totient is φ = 1221413125410.

The previous prime is 1221413125409. The next prime is 1221413125417. The reversal of 1221413125411 is 1145213141221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221413125411 - 2¹ = 1221413125409 is a prime.

Together with 1221413125409, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1221413125411.

It is not a weakly prime, because it can be changed into another prime (1221413125417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610706562705 + 610706562706.

It is an arithmetic number, because the mean of its divisors is an integer number (610706562706).

Almost surely, 2^{1221413125411} is an apocalyptic number.

1221413125411 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221413125411 is an equidigital number, since it uses as much as digits as its factorization.

1221413125411 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920, while the sum is 28.

Adding to 1221413125411 its reverse (1145213141221), we get a palindrome (2366626266632).

The spelling of 1221413125411 in words is "one trillion, two hundred twenty-one billion, four hundred thirteen million, one hundred twenty-five thousand, four hundred eleven".