2102202421 has 8 divisors (see below), whose sum is σ = 2293818624. Its totient is φ = 1910670720.

The previous prime is 2102202419. The next prime is 2102202433. The reversal of 2102202421 is 1242022012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2102202421 - 2¹ = 2102202419 is a prime.

It is a super-2 number, since 2×2102202421² = 8838510037716522482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2102202395 and 2102202404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102202481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38140 + ... + 75226.

It is an arithmetic number, because the mean of its divisors is an integer number (286727328).

Almost surely, 2^2102202421 is an apocalyptic number.

It is an amenable number.

2102202421 is a deficient number, since it is larger than the sum of its proper divisors (191616203).

2102202421 is a wasteful number, since it uses less digits than its factorization.

2102202421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42251.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 2102202421 is about 45849.7810354641. The cubic root of 2102202421 is about 1281.0266870578.

Adding to 2102202421 its reverse (1242022012), we get a palindrome (3344224433).

The spelling of 2102202421 in words is "two billion, one hundred two million, two hundred two thousand, four hundred twenty-one".