2101222512 has 40 divisors (see below), whose sum is σ = 6031288080. Its totient is φ = 700407360.

The previous prime is 2101222507. The next prime is 2101222517. The reversal of 2101222512 is 2152221012.

It is an interprime number because it is at equal distance from previous prime (2101222507) and next prime (2101222517).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101222517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2431539 + ... + 2432402.

It is an arithmetic number, because the mean of its divisors is an integer number (150782202).

Almost surely, 2^2101222512 is an apocalyptic number.

It is an amenable number.

2101222512 is an abundant number, since it is smaller than the sum of its proper divisors (3930065568).

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

2101222512 is a wasteful number, since it uses less digits than its factorization.

2101222512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4863958 (or 4863946 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 2101222512 is about 45839.0937083184. The cubic root of 2101222512 is about 1280.8276125598.

Adding to 2101222512 its reverse (2152221012), we get a palindrome (4253443524).

The spelling of 2101222512 in words is "two billion, one hundred one million, two hundred twenty-two thousand, five hundred twelve".