2121201311320 has 192 divisors, whose sum is σ = 6293675656800. Its totient is φ = 635992197120.

The previous prime is 2121201311269. The next prime is 2121201311323. The reversal of 2121201311320 is 231131021212.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121201311323) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1706661 + ... + 2674900.

Almost surely, 2^{2121201311320} is an apocalyptic number.

2121201311320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121201311320 is an abundant number, since it is smaller than the sum of its proper divisors (4172474345480).

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

2121201311320 is a wasteful number, since it uses less digits than its factorization.

2121201311320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4381618 (or 4381607 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 2121201311320 its reverse (231131021212), we get a palindrome (2352332332532).

The spelling of 2121201311320 in words is "two trillion, one hundred twenty-one billion, two hundred one million, three hundred eleven thousand, three hundred twenty".