1021120001 has 8 divisors (see below), whose sum is σ = 1114180608. Its totient is φ = 928098000.

The previous prime is 1021119973. The next prime is 1021120013. The reversal of 1021120001 is 1000211201.

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 1021120001 - 2¹⁰ = 1021118977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021120031) 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, 95936 + ... + 106046.

It is an arithmetic number, because the mean of its divisors is an integer number (139272576).

Almost surely, 2^1021120001 is an apocalyptic number.

1021120001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1021120001 is a deficient number, since it is larger than the sum of its proper divisors (93060607).

1021120001 is a wasteful number, since it uses less digits than its factorization.

1021120001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19303.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1021120001 is about 31954.9683304490. The cubic root of 1021120001 is about 1006.9910121884.

Adding to 1021120001 its reverse (1000211201), we get a palindrome (2021331202).

The spelling of 1021120001 in words is "one billion, twenty-one million, one hundred twenty thousand, one".