221222401040 has 40 divisors (see below), whose sum is σ = 515142112128. Its totient is φ = 88351320960.

The previous prime is 221222401013. The next prime is 221222401061. The reversal of 221222401040 is 40104222122.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2098856 + ... + 2201735.

Almost surely, 2^221222401040 is an apocalyptic number.

221222401040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221222401040 is an abundant number, since it is smaller than the sum of its proper divisors (293919711088).

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

221222401040 is a wasteful number, since it uses less digits than its factorization.

221222401040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4301247 (or 4301241 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 221222401040 its reverse (40104222122), we get a palindrome (261326623162).

The spelling of 221222401040 in words is "two hundred twenty-one billion, two hundred twenty-two million, four hundred one thousand, forty".