1021101145 has 4 divisors (see below), whose sum is σ = 1225321380. Its totient is φ = 816880912.

The previous prime is 1021101113. The next prime is 1021101163. The reversal of 1021101145 is 5411011201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5411011201 = 271 ⋅19966831.

It can be written as a sum of positive squares in 2 ways, for example, as 809573209 + 211527936 = 28453^2 + 14544^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021101145 - 2⁵ = 1021101113 is a prime.

It is a super-2 number, since 2×1021101145² = 2085295096640622050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102110110 + ... + 102110119.

It is an arithmetic number, because the mean of its divisors is an integer number (306330345).

Almost surely, 2^1021101145 is an apocalyptic number.

It is an amenable number.

1021101145 is a deficient number, since it is larger than the sum of its proper divisors (204220235).

1021101145 is an equidigital number, since it uses as much as digits as its factorization.

1021101145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204220234.

The product of its (nonzero) digits is 40, while the sum is 16.

The square root of 1021101145 is about 31954.6732888947. The cubic root of 1021101145 is about 1006.9848137856.

Adding to 1021101145 its reverse (5411011201), we get a palindrome (6432112346).

The spelling of 1021101145 in words is "one billion, twenty-one million, one hundred one thousand, one hundred forty-five".