1001011421 has 4 divisors (see below), whose sum is σ = 1033302144. Its totient is φ = 968720700.

The previous prime is 1001011411. The next prime is 1001011489. The reversal of 1001011421 is 1241101001.

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 a de Polignac number, because none of the positive numbers 2^k-1001011421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001011411) 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, 16145315 + ... + 16145376.

It is an arithmetic number, because the mean of its divisors is an integer number (258325536).

Almost surely, 2^1001011421 is an apocalyptic number.

It is an amenable number.

1001011421 is a deficient number, since it is larger than the sum of its proper divisors (32290723).

1001011421 is an equidigital number, since it uses as much as digits as its factorization.

1001011421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32290722.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1001011421 is about 31638.7645302404. The cubic root of 1001011421 is about 1000.3370267336.

Adding to 1001011421 its reverse (1241101001), we get a palindrome (2242112422).

The spelling of 1001011421 in words is "one billion, one million, eleven thousand, four hundred twenty-one".