1203120213021 has 6 divisors (see below), whose sum is σ = 1737840307710. Its totient is φ = 802080142008.

The previous prime is 1203120213007. The next prime is 1203120213079.

1203120213021 is a `hidden beast` number, since 120 + 312 + 0 + 213 + 0 + 21 = 666.

1203120213021 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 1154152719225 + 48967493796 = 1074315^2 + 221286^2 .

It is not a de Polignac number, because 1203120213021 - 2⁵ = 1203120212989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1203120212985 and 1203120213003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1203120213221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 66840011826 + ... + 66840011843.

It is an arithmetic number, because the mean of its divisors is an integer number (289640051285).

Almost surely, 2^{1203120213021} is an apocalyptic number.

It is an amenable number.

1203120213021 is a deficient number, since it is larger than the sum of its proper divisors (534720094689).

1203120213021 is a wasteful number, since it uses less digits than its factorization.

1203120213021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133680023675 (or 133680023672 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

It can be divided in two parts, 1203120 and 213021, that added together give a palindrome (1416141).

The spelling of 1203120213021 in words is "one trillion, two hundred three billion, one hundred twenty million, two hundred thirteen thousand, twenty-one".