7021611125 has 8 divisors (see below), whose sum is σ = 8762970840. Its totient is φ = 5617288800.

The previous prime is 7021611067. The next prime is 7021611127. The reversal of 7021611125 is 5211161207.

It can be written as a sum of positive squares in 4 ways, for example, as 930433009 + 6091178116 = 30503^2 + 78046^2 .

It is not a de Polignac number, because 7021611125 - 2¹⁸ = 7021348981 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7021611094 and 7021611103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7021611127) 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, 28086320 + ... + 28086569.

It is an arithmetic number, because the mean of its divisors is an integer number (1095371355).

Almost surely, 2^7021611125 is an apocalyptic number.

It is an amenable number.

7021611125 is a deficient number, since it is larger than the sum of its proper divisors (1741359715).

7021611125 is an equidigital number, since it uses as much as digits as its factorization.

7021611125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56172904 (or 56172894 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 26.

The square root of 7021611125 is about 83795.0542991649. The cubic root of 7021611125 is about 1914.8977601091.

The spelling of 7021611125 in words is "seven billion, twenty-one million, six hundred eleven thousand, one hundred twenty-five".