1061121521 has 8 divisors (see below), whose sum is σ = 1128245760. Its totient is φ = 994520128.

The previous prime is 1061121517. The next prime is 1061121539. The reversal of 1061121521 is 1251211601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1061121521 - 2² = 1061121517 is a prime.

It is a super-2 number, since 2×1061121521² = 2251957764658706882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1061121493 and 1061121502.

It is not an unprimeable number, because it can be changed into a prime (1061121421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126521 + ... + 134646.

It is an arithmetic number, because the mean of its divisors is an integer number (141030720).

Almost surely, 2^1061121521 is an apocalyptic number.

It is an amenable number.

1061121521 is a deficient number, since it is larger than the sum of its proper divisors (67124239).

1061121521 is a wasteful number, since it uses less digits than its factorization.

1061121521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261423.

The product of its (nonzero) digits is 120, while the sum is 20.

The square root of 1061121521 is about 32574.8602606366. The cubic root of 1061121521 is about 1019.9722922757.

The spelling of 1061121521 in words is "one billion, sixty-one million, one hundred twenty-one thousand, five hundred twenty-one".