10420120544621 has 2 divisors, whose sum is σ = 10420120544622. Its totient is φ = 10420120544620.

The previous prime is 10420120544489. The next prime is 10420120544681. The reversal of 10420120544621 is 12644502102401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10202843367721 + 217277176900 = 3194189^2 + 466130^2 .

It is a cyclic number.

It is not a de Polignac number, because 10420120544621 - 2¹⁸ = 10420120282477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10420120544681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5210060272310 + 5210060272311.

It is an arithmetic number, because the mean of its divisors is an integer number (5210060272311).

Almost surely, 2^{10420120544621} is an apocalyptic number.

It is an amenable number.

10420120544621 is a deficient number, since it is larger than the sum of its proper divisors (1).

10420120544621 is an equidigital number, since it uses as much as digits as its factorization.

10420120544621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15360, while the sum is 32.

The spelling of 10420120544621 in words is "ten trillion, four hundred twenty billion, one hundred twenty million, five hundred forty-four thousand, six hundred twenty-one".