21225501132 has 48 divisors (see below), whose sum is σ = 54048457344. Its totient is φ = 6429600000.

The previous prime is 21225501131. The next prime is 21225501137. The reversal of 21225501132 is 23110552212.

It is not an unprimeable number, because it can be changed into a prime (21225501131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 348132 + ... + 404532.

It is an arithmetic number, because the mean of its divisors is an integer number (1126009528).

Almost surely, 2^21225501132 is an apocalyptic number.

21225501132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21225501132 is an abundant number, since it is smaller than the sum of its proper divisors (32822956212).

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

21225501132 is a wasteful number, since it uses less digits than its factorization.

21225501132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59270 (or 59268 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The spelling of 21225501132 in words is "twenty-one billion, two hundred twenty-five million, five hundred one thousand, one hundred thirty-two".