10212120442 has 4 divisors (see below), whose sum is σ = 15318180666. Its totient is φ = 5106060220.

The previous prime is 10212120431. The next prime is 10212120449. The reversal of 10212120442 is 24402121201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 9356499441 + 855621001 = 96729^2 + 29251^2 .

It is not an unprimeable number, because it can be changed into a prime (10212120449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2553030109 + ... + 2553030112.

Almost surely, 2^10212120442 is an apocalyptic number.

10212120442 is a deficient number, since it is larger than the sum of its proper divisors (5106060224).

10212120442 is an equidigital number, since it uses as much as digits as its factorization.

10212120442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5106060223.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 10212120442 its reverse (24402121201), we get a palindrome (34614241643).

The spelling of 10212120442 in words is "ten billion, two hundred twelve million, one hundred twenty thousand, four hundred forty-two".