151221100 has 36 divisors (see below), whose sum is σ = 338742208. Its totient is φ = 58536000.

The previous prime is 151221073. The next prime is 151221127. The reversal of 151221100 is 1122151.

It is an interprime number because it is at equal distance from previous prime (151221073) and next prime (151221127).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21291 + ... + 27490.

Almost surely, 2^151221100 is an apocalyptic number.

151221100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

151221100 is an abundant number, since it is smaller than the sum of its proper divisors (187521108).

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

151221100 is a wasteful number, since it uses less digits than its factorization.

151221100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48826 (or 48819 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 151221100 is about 12297.1988680349. The cubic root of 151221100 is about 532.7671813406.

Adding to 151221100 its reverse (1122151), we get a palindrome (152343251).

It can be divided in two parts, 151221 and 100, that added together give a square (151321 = 389²).

The spelling of 151221100 in words is "one hundred fifty-one million, two hundred twenty-one thousand, one hundred".