1200010100021 has 8 divisors (see below), whose sum is σ = 1270626776640. Its totient is φ = 1129396517568.

The previous prime is 1200010099999. The next prime is 1200010100077.

1200010100021 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 1200010100021 - 2²² = 1200005905717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200010099981 and 1200010100008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200010100521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50000 + ... + 1550006.

It is an arithmetic number, because the mean of its divisors is an integer number (158828347080).

Almost surely, 2^{1200010100021} is an apocalyptic number.

It is an amenable number.

1200010100021 is a deficient number, since it is larger than the sum of its proper divisors (70616676619).

1200010100021 is a wasteful number, since it uses less digits than its factorization.

1200010100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1547083.

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

It can be divided in two parts, 1200010 and 100021, that added together give a palindrome (1300031).

The spelling of 1200010100021 in words is "one trillion, two hundred billion, ten million, one hundred thousand, twenty-one".