1200333100021 has 32 divisors (see below), whose sum is σ = 1391634421632. Its totient is φ = 1023212636160.

The previous prime is 1200333100009. The next prime is 1200333100027. The reversal of 1200333100021 is 1200013330021.

It is not a de Polignac number, because 1200333100021 - 2¹⁵ = 1200333067253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200333099968 and 1200333100004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200333100027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57845370 + ... + 57866116.

It is an arithmetic number, because the mean of its divisors is an integer number (43488575676).

Almost surely, 2^{1200333100021} is an apocalyptic number.

1200333100021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200333100021 is a deficient number, since it is larger than the sum of its proper divisors (191301321611).

1200333100021 is a wasteful number, since it uses less digits than its factorization.

1200333100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21909.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 1200333100021 its reverse (1200013330021), we get a palindrome (2400346430042).

The spelling of 1200333100021 in words is "one trillion, two hundred billion, three hundred thirty-three million, one hundred thousand, twenty-one".