101221550 has 48 divisors (see below), whose sum is σ = 202487040. Its totient is φ = 37524960.

The previous prime is 101221469. The next prime is 101221559. The reversal of 101221550 is 55122101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101221559) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43517 + ... + 45783.

It is an arithmetic number, because the mean of its divisors is an integer number (4218480).

Almost surely, 2^101221550 is an apocalyptic number.

101221550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

101221550 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

101221550 is a wasteful number, since it uses less digits than its factorization.

101221550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2345 (or 2340 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 101221550 is about 10060.8921075618. The cubic root of 101221550 is about 466.0412171050.

Adding to 101221550 its reverse (55122101), we get a palindrome (156343651).

The spelling of 101221550 in words is "one hundred one million, two hundred twenty-one thousand, five hundred fifty".