1201001021 has 8 divisors (see below), whose sum is σ = 1310761344. Its totient is φ = 1091337120.

The previous prime is 1201001017. The next prime is 1201001029.

1201001021 is nontrivially palindromic in base 10.

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 1201001021 - 2² = 1201001017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201001029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3305 + ... + 49121.

It is an arithmetic number, because the mean of its divisors is an integer number (163845168).

Almost surely, 2^1201001021 is an apocalyptic number.

1201001021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1201001021 is a deficient number, since it is larger than the sum of its proper divisors (109760323).

1201001021 is a wasteful number, since it uses less digits than its factorization.

1201001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48211.

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

The square root of 1201001021 is about 34655.4616330529. The cubic root of 1201001021 is about 1062.9539713755.

It can be divided in two parts, 120100 and 1021, that added together give a palindrome (121121).

The spelling of 1201001021 in words is "one billion, two hundred one million, one thousand, twenty-one".