1002211121090 has 8 divisors (see below), whose sum is σ = 1803980017980. Its totient is φ = 400884448432.

The previous prime is 1002211121081. The next prime is 1002211121113. The reversal of 1002211121090 is 901211122001.

It can be written as a sum of positive squares in 2 ways, for example, as 1000386037249 + 1825083841 = 1000193^2 + 42721^2 .

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

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, 50110556045 + ... + 50110556064.

Almost surely, 2^{1002211121090} is an apocalyptic number.

1002211121090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1002211121090 is a deficient number, since it is larger than the sum of its proper divisors (801768896890).

1002211121090 is a wasteful number, since it uses less digits than its factorization.

1002211121090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100221112116.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 1002211121090 its reverse (901211122001), we get a palindrome (1903422243091).

The spelling of 1002211121090 in words is "one trillion, two billion, two hundred eleven million, one hundred twenty-one thousand, ninety".