1021650061 has 2 divisors, whose sum is σ = 1021650062. Its totient is φ = 1021650060.

The previous prime is 1021650011. The next prime is 1021650073. The reversal of 1021650061 is 1600561201.

1021650061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 784336036 + 237314025 = 28006^2 + 15405^2 .

It is an emirp because it is prime and its reverse (1600561201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1021650061 - 2¹³ = 1021641869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021650011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510825030 + 510825031.

It is an arithmetic number, because the mean of its divisors is an integer number (510825031).

Almost surely, 2^1021650061 is an apocalyptic number.

It is an amenable number.

1021650061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021650061 is an equidigital number, since it uses as much as digits as its factorization.

1021650061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 1021650061 is about 31963.2611133470. The cubic root of 1021650061 is about 1007.1652239439.

The spelling of 1021650061 in words is "one billion, twenty-one million, six hundred fifty thousand, sixty-one".