1235001145421 has 2 divisors, whose sum is σ = 1235001145422. Its totient is φ = 1235001145420.

The previous prime is 1235001145403. The next prime is 1235001145423. The reversal of 1235001145421 is 1245411005321.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1234787664100 + 213481321 = 1111210^2 + 14611^2 .

It is a cyclic number.

It is not a de Polignac number, because 1235001145421 - 2²² = 1234996951117 is a prime.

Together with 1235001145423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1235001145423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 617500572710 + 617500572711.

It is an arithmetic number, because the mean of its divisors is an integer number (617500572711).

Almost surely, 2^{1235001145421} is an apocalyptic number.

It is an amenable number.

1235001145421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1235001145421 is an equidigital number, since it uses as much as digits as its factorization.

1235001145421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4800, while the sum is 29.

The spelling of 1235001145421 in words is "one trillion, two hundred thirty-five billion, one million, one hundred forty-five thousand, four hundred twenty-one".