1012911421 has 4 divisors (see below), whose sum is σ = 1056951072. Its totient is φ = 968871772.

The previous prime is 1012911407. The next prime is 1012911457. The reversal of 1012911421 is 1241192101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1012911421 - 2⁹ = 1012910909 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1012911392 and 1012911401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012911491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22019791 + ... + 22019836.

It is an arithmetic number, because the mean of its divisors is an integer number (264237768).

Almost surely, 2^1012911421 is an apocalyptic number.

It is an amenable number.

1012911421 is a deficient number, since it is larger than the sum of its proper divisors (44039651).

1012911421 is an equidigital number, since it uses as much as digits as its factorization.

1012911421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44039650.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 1012911421 is about 31826.2693541043. The cubic root of 1012911421 is about 1004.2854159763.

The spelling of 1012911421 in words is "one billion, twelve million, nine hundred eleven thousand, four hundred twenty-one".