1025201407421 has 2 divisors, whose sum is σ = 1025201407422. Its totient is φ = 1025201407420.

The previous prime is 1025201407387. The next prime is 1025201407541. The reversal of 1025201407421 is 1247041025201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1011090580900 + 14110826521 = 1005530^2 + 118789^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1025201407421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1025201307421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512600703710 + 512600703711.

It is an arithmetic number, because the mean of its divisors is an integer number (512600703711).

Almost surely, 2^{1025201407421} is an apocalyptic number.

It is an amenable number.

1025201407421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025201407421 is an equidigital number, since it uses as much as digits as its factorization.

1025201407421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4480, while the sum is 29.

The spelling of 1025201407421 in words is "one trillion, twenty-five billion, two hundred one million, four hundred seven thousand, four hundred twenty-one".