1010021210001 has 16 divisors (see below), whose sum is σ = 1584346996800. Its totient is φ = 633738798144.

The previous prime is 1010021209987. The next prime is 1010021210041. The reversal of 1010021210001 is 1000121200101.

It is a happy number.

It is not a de Polignac number, because 1010021210001 - 2⁹ = 1010021209489 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 (1010021210041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1100240511 + ... + 1100241428.

It is an arithmetic number, because the mean of its divisors is an integer number (99021687300).

Almost surely, 2^{1010021210001} is an apocalyptic number.

It is an amenable number.

1010021210001 is a deficient number, since it is larger than the sum of its proper divisors (574325786799).

1010021210001 is a wasteful number, since it uses less digits than its factorization.

1010021210001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2200481965 (or 2200481959 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1010021210001 its reverse (1000121200101), we get a palindrome (2010142410102).

The spelling of 1010021210001 in words is "one trillion, ten billion, twenty-one million, two hundred ten thousand, one".