1321211213301 has 24 divisors (see below), whose sum is σ = 2157079536480. Its totient is φ = 715242159072.

The previous prime is 1321211213269. The next prime is 1321211213321. The reversal of 1321211213301 is 1033121121231.

It is not a de Polignac number, because 1321211213301 - 2⁵ = 1321211213269 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321211213321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 236519086 + ... + 236524671.

It is an arithmetic number, because the mean of its divisors is an integer number (89878314020).

Almost surely, 2^{1321211213301} is an apocalyptic number.

It is an amenable number.

1321211213301 is a deficient number, since it is larger than the sum of its proper divisors (835868323179).

1321211213301 is a wasteful number, since it uses less digits than its factorization.

1321211213301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473043793 (or 473043786 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1321211213301 its reverse (1033121121231), we get a palindrome (2354332334532).

The spelling of 1321211213301 in words is "one trillion, three hundred twenty-one billion, two hundred eleven million, two hundred thirteen thousand, three hundred one".