1021021110001 has 8 divisors (see below), whose sum is σ = 1032179292864. Its totient is φ = 1009883497200.

The previous prime is 1021021109987. The next prime is 1021021110013. The reversal of 1021021110001 is 1000111201201.

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 1021021110001 - 2³³ = 1012431175409 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1021021110001.

It is not an unprimeable number, because it can be changed into a prime (1021021110041) 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, 5042691 + ... + 5241256.

It is an arithmetic number, because the mean of its divisors is an integer number (129022411608).

Almost surely, 2^{1021021110001} is an apocalyptic number.

It is an amenable number.

1021021110001 is a deficient number, since it is larger than the sum of its proper divisors (11158182863).

1021021110001 is a wasteful number, since it uses less digits than its factorization.

1021021110001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10285031.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1021021110001 its reverse (1000111201201), we get a palindrome (2021132311202).

The spelling of 1021021110001 in words is "one trillion, twenty-one billion, twenty-one million, one hundred ten thousand, one".