2121015412 has 18 divisors (see below), whose sum is σ = 3835381074. Its totient is φ = 1026295920.

The previous prime is 2121015401. The next prime is 2121015433. The reversal of 2121015412 is 2145101212.

It can be written as a sum of positive squares in only one way, i.e., 1370036196 + 750979216 = 37014^2 + 27404^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2121015412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 272043 + ... + 279730.

Almost surely, 2^2121015412 is an apocalyptic number.

It is an amenable number.

2121015412 is a deficient number, since it is larger than the sum of its proper divisors (1714365662).

2121015412 is a wasteful number, since it uses less digits than its factorization.

2121015412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551839 (or 551806 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 2121015412 is about 46054.4830825404. The cubic root of 2121015412 is about 1284.8367240955.

Adding to 2121015412 its reverse (2145101212), we get a palindrome (4266116624).

The spelling of 2121015412 in words is "two billion, one hundred twenty-one million, fifteen thousand, four hundred twelve".