1012121403 has 16 divisors (see below), whose sum is σ = 1358063616. Its totient is φ = 670475520.

The previous prime is 1012121399. The next prime is 1012121419. The reversal of 1012121403 is 3041212101.

It is not a de Polignac number, because 1012121403 - 2² = 1012121399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1012121423) 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, 485323 + ... + 487403.

It is an arithmetic number, because the mean of its divisors is an integer number (84878976).

Almost surely, 2^1012121403 is an apocalyptic number.

1012121403 is a deficient number, since it is larger than the sum of its proper divisors (345942213).

1012121403 is a wasteful number, since it uses less digits than its factorization.

1012121403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3034.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1012121403 is about 31813.8555192545. The cubic root of 1012121403 is about 1004.0242513441.

Adding to 1012121403 its reverse (3041212101), we get a palindrome (4053333504).

The spelling of 1012121403 in words is "one billion, twelve million, one hundred twenty-one thousand, four hundred three".