2130021121221 has 12 divisors (see below), whose sum is σ = 3516225343072. Its totient is φ = 1217154926376.

The previous prime is 2130021121199. The next prime is 2130021121223. The reversal of 2130021121221 is 1221211200312.

2130021121221 is a `hidden beast` number, since 2 + 1 + 300 + 21 + 121 + 221 = 666.

It is not a de Polignac number, because 2130021121221 - 2¹⁵ = 2130021088453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2130021121194 and 2130021121203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2130021121223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16904929471 + ... + 16904929596.

Almost surely, 2^{2130021121221} is an apocalyptic number.

2130021121221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2130021121221 is a deficient number, since it is larger than the sum of its proper divisors (1386204221851).

2130021121221 is a wasteful number, since it uses less digits than its factorization.

2130021121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33809859080 (or 33809859077 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 2130021121221 its reverse (1221211200312), we get a palindrome (3351232321533).

The spelling of 2130021121221 in words is "two trillion, one hundred thirty billion, twenty-one million, one hundred twenty-one thousand, two hundred twenty-one".