1051980486921 has 225 divisors, whose sum is σ = 2034589843221. Its totient is φ = 522250170624.

The previous prime is 1051980486883. The next prime is 1051980486959. The reversal of 1051980486921 is 1296840891501.

The square root of 1051980486921 is 1025661.

It is a perfect power (a square), and thus also a powerful number.

1051980486921 is a `hidden beast` number, since 1 + 0 + 51 + 98 + 0 + 486 + 9 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (1051980486883) and next prime (1051980486959).

It can be written as a sum of positive squares in 12 ways, for example, as 1014328965321 + 37651521600 = 1007139^2 + 194040^2 .

It is not a de Polignac number, because 1051980486921 - 2⁷ = 1051980486793 is a prime.

It is a super-2 number, since 2×1051980486921² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1051980481921) by changing a digit.

It is a polite number, since it can be written in 224 ways as a sum of consecutive naturals, for example, 61881205105 + ... + 61881205121.

Almost surely, 2^{1051980486921} is an apocalyptic number.

1051980486921 is the 1025661-st square number.

1051980486921 is the 512831-st centered octagonal number.

It is an amenable number.

1051980486921 is a deficient number, since it is larger than the sum of its proper divisors (982609356300).

1051980486921 is an frugal number, since it uses more digits than its factorization.

1051980486921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 40 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 54.

The spelling of 1051980486921 in words is "one trillion, fifty-one billion, nine hundred eighty million, four hundred eighty-six thousand, nine hundred twenty-one".