1222641229428 has 36 divisors (see below), whose sum is σ = 3092059266660. Its totient is φ = 407350073856.

The previous prime is 1222641229427. The next prime is 1222641229441. The reversal of 1222641229428 is 8249221462221.

It is a happy number.

1222641229428 is a `hidden beast` number, since 1 + 2 + 226 + 412 + 2 + 9 + 4 + 2 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 513074229264 + 709567000164 = 716292^2 + 842358^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×1222641229428² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222641229427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8132925 + ... + 8281892.

It is an arithmetic number, because the mean of its divisors is an integer number (85890535185).

Almost surely, 2^{1222641229428} is an apocalyptic number.

1222641229428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1222641229428 is an abundant number, since it is smaller than the sum of its proper divisors (1869418037232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1222641229428 is a wasteful number, since it uses less digits than its factorization.

1222641229428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16416896 (or 16416891 counting only the distinct ones).

The product of its digits is 442368, while the sum is 45.

The spelling of 1222641229428 in words is "one trillion, two hundred twenty-two billion, six hundred forty-one million, two hundred twenty-nine thousand, four hundred twenty-eight".