213121313021076 has 48 divisors (see below), whose sum is σ = 516160499731968. Its totient is φ = 68368982947200.

The previous prime is 213121313021047. The next prime is 213121313021077. The reversal of 213121313021076 is 670120313121312.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213121313021077) 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 15 ways as a sum of consecutive naturals, for example, 1582548015 + ... + 1582682678.

It is an arithmetic number, because the mean of its divisors is an integer number (10753343744416).

Almost surely, 2^{213121313021076} is an apocalyptic number.

It is an amenable number.

213121313021076 is an abundant number, since it is smaller than the sum of its proper divisors (303039186710892).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213121313021076 is a wasteful number, since it uses less digits than its factorization.

213121313021076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3165230912 (or 3165230910 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

Adding to 213121313021076 its reverse (670120313121312), we get a palindrome (883241626142388).

The spelling of 213121313021076 in words is "two hundred thirteen trillion, one hundred twenty-one billion, three hundred thirteen million, twenty-one thousand, seventy-six".