1002022101 has 12 divisors (see below), whose sum is σ = 1451935212. Its totient is φ = 665905536.

The previous prime is 1002022027. The next prime is 1002022103. The reversal of 1002022101 is 1012202001.

It can be written as a sum of positive squares in 2 ways, for example, as 546156900 + 455865201 = 23370^2 + 21351^2 .

It is not a de Polignac number, because 1002022101 - 2¹¹ = 1002020053 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002022103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 172756 + ... + 178461.

It is an arithmetic number, because the mean of its divisors is an integer number (120994601).

Almost surely, 2^1002022101 is an apocalyptic number.

It is an amenable number.

1002022101 is a deficient number, since it is larger than the sum of its proper divisors (449913111).

1002022101 is a wasteful number, since it uses less digits than its factorization.

1002022101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351540 (or 351537 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1002022101 is about 31654.7326793325. The cubic root of 1002022101 is about 1000.6735798550.

Adding to 1002022101 its reverse (1012202001), we get a palindrome (2014224102).

The spelling of 1002022101 in words is "one billion, two million, twenty-two thousand, one hundred one".