1012212761 has 4 divisors (see below), whose sum is σ = 1156814592. Its totient is φ = 867610932.

The previous prime is 1012212757. The next prime is 1012212767. The reversal of 1012212761 is 1672122101.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1672122101 = 13 ⋅128624777.

It is a cyclic number.

It is not a de Polignac number, because 1012212761 - 2² = 1012212757 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012212767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72300905 + ... + 72300918.

It is an arithmetic number, because the mean of its divisors is an integer number (289203648).

Almost surely, 2^1012212761 is an apocalyptic number.

It is an amenable number.

1012212761 is a deficient number, since it is larger than the sum of its proper divisors (144601831).

1012212761 is an equidigital number, since it uses as much as digits as its factorization.

1012212761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144601830.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 1012212761 is about 31815.2913077973. The cubic root of 1012212761 is about 1004.0544594751.

Adding to 1012212761 its reverse (1672122101), we get a palindrome (2684334862).

The spelling of 1012212761 in words is "one billion, twelve million, two hundred twelve thousand, seven hundred sixty-one".