1200450540021 has 8 divisors (see below), whose sum is σ = 1601150955360. Its totient is φ = 800025242352.

The previous prime is 1200450540019. The next prime is 1200450540031.

1200450540021 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1200450540021 - 2¹ = 1200450540019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1200450539973 and 1200450540000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200450540001) 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, 68769235 + ... + 68786688.

It is an arithmetic number, because the mean of its divisors is an integer number (200143869420).

Almost surely, 2^{1200450540021} is an apocalyptic number.

It is an amenable number.

1200450540021 is a deficient number, since it is larger than the sum of its proper divisors (400700415339).

1200450540021 is a wasteful number, since it uses less digits than its factorization.

1200450540021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137558835.

The product of its (nonzero) digits is 1600, while the sum is 24.

It can be divided in two parts, 1200450 and 540021, that added together give a palindrome (1740471).

The spelling of 1200450540021 in words is "one trillion, two hundred billion, four hundred fifty million, five hundred forty thousand, twenty-one".