1002211010021 has 8 divisors (see below), whose sum is σ = 1079313241944. Its totient is φ = 925110074880.

The previous prime is 1002211009999. The next prime is 1002211010023. The reversal of 1002211010021 is 1200101122001.

It can be written as a sum of positive squares in 4 ways, for example, as 276581328100 + 725629681921 = 525910^2 + 851839^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1002211010021 - 2³⁴ = 985031140837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002211009984 and 1002211010011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002211010023) 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, 1793165 + ... + 2284701.

It is an arithmetic number, because the mean of its divisors is an integer number (134914155243).

Almost surely, 2^{1002211010021} is an apocalyptic number.

It is an amenable number.

1002211010021 is a deficient number, since it is larger than the sum of its proper divisors (77102231923).

1002211010021 is a wasteful number, since it uses less digits than its factorization.

1002211010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648391.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1002211010021 its reverse (1200101122001), we get a palindrome (2202312132022).

The spelling of 1002211010021 in words is "one trillion, two billion, two hundred eleven million, ten thousand, twenty-one".