1242100210 has 32 divisors (see below), whose sum is σ = 2421725040. Its totient is φ = 455962368.

The previous prime is 1242100201. The next prime is 1242100213. The reversal of 1242100210 is 120012421.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1028677329 + 213422881 = 32073^2 + 14609^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (1242100213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5125 + ... + 50104.

Almost surely, 2^1242100210 is an apocalyptic number.

1242100210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1242100210 is a deficient number, since it is larger than the sum of its proper divisors (1179624830).

1242100210 is a wasteful number, since it uses less digits than its factorization.

1242100210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55422.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1242100210 is about 35243.4420850177. The cubic root of 1242100210 is about 1074.9432701269.

Adding to 1242100210 its reverse (120012421), we get a palindrome (1362112631).

The spelling of 1242100210 in words is "one billion, two hundred forty-two million, one hundred thousand, two hundred ten".