1121400016 has 20 divisors (see below), whose sum is σ = 2370232224. Its totient is φ = 509727200.

The previous prime is 1121400001. The next prime is 1121400017. The reversal of 1121400016 is 6100041211.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121400017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3185620 + ... + 3185971.

Almost surely, 2^1121400016 is an apocalyptic number.

1121400016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1121400016 is an abundant number, since it is smaller than the sum of its proper divisors (1248832208).

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

1121400016 is a wasteful number, since it uses less digits than its factorization.

1121400016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6371610 (or 6371604 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1121400016 is about 33487.3112685984. The cubic root of 1121400016 is about 1038.9313529833.

Adding to 1121400016 its reverse (6100041211), we get a palindrome (7221441227).

The spelling of 1121400016 in words is "one billion, one hundred twenty-one million, four hundred thousand, sixteen".