221151211040 has 48 divisors (see below), whose sum is σ = 522587720088. Its totient is φ = 88440508416.

The previous prime is 221151211033. The next prime is 221151211063. The reversal of 221151211040 is 40112151122.

It can be written as a sum of positive squares in 4 ways, for example, as 196749022096 + 24402188944 = 443564^2 + 156212^2 .

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, 565064 + ... + 872696.

Almost surely, 2^221151211040 is an apocalyptic number.

221151211040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221151211040 is an abundant number, since it is smaller than the sum of its proper divisors (301436509048).

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

221151211040 is a wasteful number, since it uses less digits than its factorization.

221151211040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312141 (or 312133 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 20.

Adding to 221151211040 its reverse (40112151122), we get a palindrome (261263362162).

The spelling of 221151211040 in words is "two hundred twenty-one billion, one hundred fifty-one million, two hundred eleven thousand, forty".