42221012 has 12 divisors (see below), whose sum is σ = 75605376. Its totient is φ = 20619480.

The previous prime is 42220963. The next prime is 42221027. The reversal of 42221012 is 21012224.

It is a super-2 number, since 2×42221012² = 3565227708608288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122564 + ... + 122907.

It is an arithmetic number, because the mean of its divisors is an integer number (6300448).

Almost surely, 2^42221012 is an apocalyptic number.

It is an amenable number.

42221012 is a deficient number, since it is larger than the sum of its proper divisors (33384364).

42221012 is a wasteful number, since it uses less digits than its factorization.

42221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245518 (or 245516 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 42221012 is about 6497.7697712369. The cubic root of 42221012 is about 348.2113152652.

Adding to 42221012 its reverse (21012224), we get a palindrome (63233236).

The spelling of 42221012 in words is "forty-two million, two hundred twenty-one thousand, twelve".