21011213001301 has 4 divisors (see below), whose sum is σ = 21011228656704. Its totient is φ = 21011197345900.

The previous prime is 21011213001299. The next prime is 21011213001313. The reversal of 21011213001301 is 10310031211012.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21011213001301 - 2¹ = 21011213001299 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011213001341) 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, 5603965 + ... + 8568946.

It is an arithmetic number, because the mean of its divisors is an integer number (5252807164176).

Almost surely, 2^{21011213001301} is an apocalyptic number.

It is an amenable number.

21011213001301 is a deficient number, since it is larger than the sum of its proper divisors (15655403).

21011213001301 is a wasteful number, since it uses less digits than its factorization.

21011213001301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15655402.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 21011213001301 its reverse (10310031211012), we get a palindrome (31321244212313).

The spelling of 21011213001301 in words is "twenty-one trillion, eleven billion, two hundred thirteen million, one thousand, three hundred one".