1012140021 has 8 divisors (see below), whose sum is σ = 1366602880. Its totient is φ = 666218592.

The previous prime is 1012139969. The next prime is 1012140023. The reversal of 1012140021 is 1200412101.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1012140021 - 2¹⁵ = 1012107253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1012139979 and 1012140006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012140023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2135080 + ... + 2135553.

It is an arithmetic number, because the mean of its divisors is an integer number (170825360).

Almost surely, 2^1012140021 is an apocalyptic number.

It is an amenable number.

1012140021 is a deficient number, since it is larger than the sum of its proper divisors (354462859).

1012140021 is an equidigital number, since it uses as much as digits as its factorization.

1012140021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4270715.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1012140021 is about 31814.1481262661. The cubic root of 1012140021 is about 1004.0304076572.

Adding to 1012140021 its reverse (1200412101), we get a palindrome (2212552122).

The spelling of 1012140021 in words is "one billion, twelve million, one hundred forty thousand, twenty-one".