340402022121 has 32 divisors (see below), whose sum is σ = 535503052800. Its totient is φ = 188218707840.

The previous prime is 340402022111. The next prime is 340402022153. The reversal of 340402022121 is 121220204043.

It is not a de Polignac number, because 340402022121 - 2¹⁵ = 340401989353 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (340402022111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6653125 + ... + 6704093.

It is an arithmetic number, because the mean of its divisors is an integer number (16734470400).

Almost surely, 2^340402022121 is an apocalyptic number.

340402022121 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

340402022121 is a deficient number, since it is larger than the sum of its proper divisors (195101030679).

340402022121 is a wasteful number, since it uses less digits than its factorization.

340402022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61269.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 340402022121 its reverse (121220204043), we get a palindrome (461622226164).

The spelling of 340402022121 in words is "three hundred forty billion, four hundred two million, twenty-two thousand, one hundred twenty-one".