1010020220001 has 12 divisors (see below), whose sum is σ = 1571142564628. Its totient is φ = 621550904544.

The previous prime is 1010020219997. The next prime is 1010020220009. The reversal of 1010020220001 is 1000220200101.

It can be written as a sum of positive squares in 2 ways, for example, as 559713459600 + 450306760401 = 748140^2 + 671049^2 .

It is not a de Polignac number, because 1010020220001 - 2² = 1010020219997 is a prime.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1010020220009) 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, 4316325610 + ... + 4316325843.

Almost surely, 2^{1010020220001} is an apocalyptic number.

It is an amenable number.

1010020220001 is a deficient number, since it is larger than the sum of its proper divisors (561122344627).

1010020220001 is a wasteful number, since it uses less digits than its factorization.

1010020220001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8632651472 (or 8632651469 counting only the distinct ones).

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

Adding to 1010020220001 its reverse (1000220200101), we get a palindrome (2010240420102).

The spelling of 1010020220001 in words is "one trillion, ten billion, twenty million, two hundred twenty thousand, one".