2113421205 has 48 divisors (see below), whose sum is σ = 4140607680. Its totient is φ = 915280128.

The previous prime is 2113421203. The next prime is 2113421213. The reversal of 2113421205 is 5021243112.

It is not a de Polignac number, because 2113421205 - 2¹ = 2113421203 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2113421203) 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, 61704 + ... + 89633.

It is an arithmetic number, because the mean of its divisors is an integer number (86262660).

Almost surely, 2^2113421205 is an apocalyptic number.

It is an amenable number.

2113421205 is a deficient number, since it is larger than the sum of its proper divisors (2027186475).

2113421205 is a wasteful number, since it uses less digits than its factorization.

2113421205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151378 (or 151371 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 2113421205 is about 45971.9610741156. The cubic root of 2113421205 is about 1283.3014555902.

Adding to 2113421205 its reverse (5021243112), we get a palindrome (7134664317).

The spelling of 2113421205 in words is "two billion, one hundred thirteen million, four hundred twenty-one thousand, two hundred five".