1200030021023 has 4 divisors (see below), whose sum is σ = 1229299045968. Its totient is φ = 1170760996080.

The previous prime is 1200030020993. The next prime is 1200030021031. The reversal of 1200030021023 is 3201200300021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1200030021023 - 2⁸ = 1200030020767 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200030020989 and 1200030021007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200030021053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14634512411 + ... + 14634512492.

It is an arithmetic number, because the mean of its divisors is an integer number (307324761492).

Almost surely, 2^{1200030021023} is an apocalyptic number.

1200030021023 is a deficient number, since it is larger than the sum of its proper divisors (29269024945).

1200030021023 is an equidigital number, since it uses as much as digits as its factorization.

1200030021023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29269024944.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 1200030021023 its reverse (3201200300021), we get a palindrome (4401230321044).

The spelling of 1200030021023 in words is "one trillion, two hundred billion, thirty million, twenty-one thousand, twenty-three".