1012400122 has 4 divisors (see below), whose sum is σ = 1518600186. Its totient is φ = 506200060.

The previous prime is 1012400113. The next prime is 1012400141. The reversal of 1012400122 is 2210042101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 853866841 + 158533281 = 29221^2 + 12591^2 .

It is a super-2 number, since 2×1012400122² = 2049908014051229768, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253100029 + ... + 253100032.

Almost surely, 2^1012400122 is an apocalyptic number.

1012400122 is a deficient number, since it is larger than the sum of its proper divisors (506200064).

1012400122 is an equidigital number, since it uses as much as digits as its factorization.

1012400122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506200063.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1012400122 is about 31818.2356833310. The cubic root of 1012400122 is about 1004.1164059515.

Adding to 1012400122 its reverse (2210042101), we get a palindrome (3222442223).

The spelling of 1012400122 in words is "one billion, twelve million, four hundred thousand, one hundred twenty-two".