1011642621061 has 2 divisors, whose sum is σ = 1011642621062. Its totient is φ = 1011642621060.

The previous prime is 1011642621023. The next prime is 1011642621097. The reversal of 1011642621061 is 1601262461101.

1011642621061 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., 1010045100100 + 1597520961 = 1005010^2 + 39969^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011642621061 - 2¹⁵ = 1011642588293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011642621461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505821310530 + 505821310531.

It is an arithmetic number, because the mean of its divisors is an integer number (505821310531).

Almost surely, 2^{1011642621061} is an apocalyptic number.

It is an amenable number.

1011642621061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011642621061 is an equidigital number, since it uses as much as digits as its factorization.

1011642621061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 31.

The spelling of 1011642621061 in words is "one trillion, eleven billion, six hundred forty-two million, six hundred twenty-one thousand, sixty-one".