210400122 has 16 divisors (see below), whose sum is σ = 426727872. Its totient is φ = 69145440.

The previous prime is 210400111. The next prime is 210400123. The reversal of 210400122 is 221004012.

It is a super-2 number, since 2×210400122² = 88536422675229768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 210400098 and 210400107.

It is not an unprimeable number, because it can be changed into a prime (210400123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246523 + ... + 247374.

It is an arithmetic number, because the mean of its divisors is an integer number (26670492).

Almost surely, 2^210400122 is an apocalyptic number.

210400122 is an abundant number, since it is smaller than the sum of its proper divisors (216327750).

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

210400122 is a wasteful number, since it uses less digits than its factorization.

210400122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493973.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 210400122 is about 14505.1756969711. The cubic root of 210400122 is about 594.7694627442.

Adding to 210400122 its reverse (221004012), we get a palindrome (431404134).

The spelling of 210400122 in words is "two hundred ten million, four hundred thousand, one hundred twenty-two".