2061506310421 has 2 divisors, whose sum is σ = 2061506310422. Its totient is φ = 2061506310420.

The previous prime is 2061506310403. The next prime is 2061506310449. The reversal of 2061506310421 is 1240136051602.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1871724972100 + 189781338321 = 1368110^2 + 435639^2 .

It is a cyclic number.

It is not a de Polignac number, because 2061506310421 - 2⁵ = 2061506310389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2061506310401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1030753155210 + 1030753155211.

It is an arithmetic number, because the mean of its divisors is an integer number (1030753155211).

Almost surely, 2^{2061506310421} is an apocalyptic number.

It is an amenable number.

2061506310421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2061506310421 is an equidigital number, since it uses as much as digits as its factorization.

2061506310421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 2061506310421 in words is "two trillion, sixty-one billion, five hundred six million, three hundred ten thousand, four hundred twenty-one".