42280921221 has 96 divisors (see below), whose sum is σ = 76815454464. Its totient is φ = 20167065600.

The previous prime is 42280921213. The next prime is 42280921247. The reversal of 42280921221 is 12212908224.

It is not a de Polignac number, because 42280921221 - 2³ = 42280921213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42280921201) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1759141 + ... + 1783013.

It is an arithmetic number, because the mean of its divisors is an integer number (800160984).

Almost surely, 2^42280921221 is an apocalyptic number.

42280921221 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

42280921221 is a deficient number, since it is larger than the sum of its proper divisors (34534533243).

42280921221 is a wasteful number, since it uses less digits than its factorization.

42280921221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23963 (or 23952 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The spelling of 42280921221 in words is "forty-two billion, two hundred eighty million, nine hundred twenty-one thousand, two hundred twenty-one".