100400122 has 8 divisors (see below), whose sum is σ = 150988500. Its totient is φ = 50070624.

The previous prime is 100400119. The next prime is 100400137. The reversal of 100400122 is 221004001.

It can be written as a sum of positive squares in 2 ways, for example, as 98386561 + 2013561 = 9919^2 + 1419^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×100400122² = 20160368995229768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 100400099 and 100400108.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63747 + ... + 65302.

Almost surely, 2^100400122 is an apocalyptic number.

100400122 is a deficient number, since it is larger than the sum of its proper divisors (50588378).

100400122 is a wasteful number, since it uses less digits than its factorization.

100400122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129440.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 100400122 is about 10019.9861277349. The cubic root of 100400122 is about 464.7771267861. Note that the first 3 decimals are identical.

Adding to 100400122 its reverse (221004001), we get a palindrome (321404123).

It can be divided in two parts, 1004001 and 22, that multiplied together give a palindrome (22088022).

The spelling of 100400122 in words is "one hundred million, four hundred thousand, one hundred twenty-two".