1020210934661 has 2 divisors, whose sum is σ = 1020210934662. Its totient is φ = 1020210934660.

The previous prime is 1020210934651. The next prime is 1020210934679. The reversal of 1020210934661 is 1664390120201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 917093522500 + 103117412161 = 957650^2 + 321119^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020210934661 is a prime.

It is a super-2 number, since 2×1020210934661² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020210934621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510105467330 + 510105467331.

It is an arithmetic number, because the mean of its divisors is an integer number (510105467331).

Almost surely, 2^{1020210934661} is an apocalyptic number.

It is an amenable number.

1020210934661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020210934661 is an equidigital number, since it uses as much as digits as its factorization.

1020210934661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The spelling of 1020210934661 in words is "one trillion, twenty billion, two hundred ten million, nine hundred thirty-four thousand, six hundred sixty-one".