4000121112 has 64 divisors (see below), whose sum is σ = 10775681280. Its totient is φ = 1230106752.

The previous prime is 4000121101. The next prime is 4000121113. The reversal of 4000121112 is 2111210004.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4000121113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 922293 + ... + 926619.

It is an arithmetic number, because the mean of its divisors is an integer number (168370020).

Almost surely, 2^4000121112 is an apocalyptic number.

It is an amenable number.

4000121112 is an abundant number, since it is smaller than the sum of its proper divisors (6775560168).

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

4000121112 is a wasteful number, since it uses less digits than its factorization.

4000121112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7312 (or 7308 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 4000121112 is about 63246.5106705500. The cubic root of 4000121112 is about 1587.4170729162.

Adding to 4000121112 its reverse (2111210004), we get a palindrome (6111331116).

The spelling of 4000121112 in words is "four billion, one hundred twenty-one thousand, one hundred twelve".