1262012121 has 12 divisors (see below), whose sum is σ = 1830002772. Its totient is φ = 838066176.

The previous prime is 1262012099. The next prime is 1262012131. The reversal of 1262012121 is 1212102621.

1262012121 is a `hidden beast` number, since 1 + 2 + 620 + 1 + 21 + 21 = 666.

1262012121 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 848906496 + 413105625 = 29136^2 + 20325^2 .

It is not a de Polignac number, because 1262012121 - 2¹⁹ = 1261487833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1262012094 and 1262012103.

It is not an unprimeable number, because it can be changed into a prime (1262012131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 270496 + ... + 275121.

It is an arithmetic number, because the mean of its divisors is an integer number (152500231).

Almost surely, 2^1262012121 is an apocalyptic number.

It is an amenable number.

1262012121 is a deficient number, since it is larger than the sum of its proper divisors (567990651).

1262012121 is a wasteful number, since it uses less digits than its factorization.

1262012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545880 (or 545877 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 1262012121 is about 35524.8099361559. The cubic root of 1262012121 is about 1080.6569280065.

Adding to 1262012121 its reverse (1212102621), we get a palindrome (2474114742).

The spelling of 1262012121 in words is "one billion, two hundred sixty-two million, twelve thousand, one hundred twenty-one".