1061980097621 has 4 divisors (see below), whose sum is σ = 1062848439072. Its totient is φ = 1061111756172.

The previous prime is 1061980097609. The next prime is 1061980097657. The reversal of 1061980097621 is 1267900891601.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1061980097621 is a prime.

It is a super-2 number, since 2×1061980097621² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1061980097621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1061980097681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 434168891 + ... + 434171336.

It is an arithmetic number, because the mean of its divisors is an integer number (265712109768).

Almost surely, 2^{1061980097621} is an apocalyptic number.

It is an amenable number.

1061980097621 is a deficient number, since it is larger than the sum of its proper divisors (868341451).

1061980097621 is an equidigital number, since it uses as much as digits as its factorization.

1061980097621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868341450.

The product of its (nonzero) digits is 326592, while the sum is 50.

The spelling of 1061980097621 in words is "one trillion, sixty-one billion, nine hundred eighty million, ninety-seven thousand, six hundred twenty-one".