1011012421 has 4 divisors (see below), whose sum is σ = 1011077452. Its totient is φ = 1010947392.

The previous prime is 1011012407. The next prime is 1011012427. The reversal of 1011012421 is 1242101101.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 624300196 + 386712225 = 24986^2 + 19665^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011012421 - 2⁹ = 1011011909 is a prime.

It is a super-2 number, since 2×1011012421² = 2044292230832562482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011012427) 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, 6061 + ... + 45373.

It is an arithmetic number, because the mean of its divisors is an integer number (252769363).

Almost surely, 2^1011012421 is an apocalyptic number.

It is an amenable number.

1011012421 is a deficient number, since it is larger than the sum of its proper divisors (65031).

1011012421 is an equidigital number, since it uses as much as digits as its factorization.

1011012421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65030.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1011012421 is about 31796.4215124910. The cubic root of 1011012421 is about 1003.6574140147.

Adding to 1011012421 its reverse (1242101101), we get a palindrome (2253113522).

The spelling of 1011012421 in words is "one billion, eleven million, twelve thousand, four hundred twenty-one".