2101421502 has 32 divisors (see below), whose sum is σ = 4706611200. Its totient is φ = 694956024.

The previous prime is 2101421501. The next prime is 2101421551. The reversal of 2101421502 is 2051241012.

2101421502 is a `hidden beast` number, since 21 + 0 + 142 + 1 + 502 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101421501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146352 + ... + 160067.

It is an arithmetic number, because the mean of its divisors is an integer number (147081600).

Almost surely, 2^2101421502 is an apocalyptic number.

2101421502 is an abundant number, since it is smaller than the sum of its proper divisors (2605189698).

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

2101421502 is a wasteful number, since it uses less digits than its factorization.

2101421502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306557 (or 306551 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 2101421502 is about 45841.2641841387. The cubic root of 2101421502 is about 1280.8680436009.

Adding to 2101421502 its reverse (2051241012), we get a palindrome (4152662514).

The spelling of 2101421502 in words is "two billion, one hundred one million, four hundred twenty-one thousand, five hundred two".