1000021210 has 32 divisors (see below), whose sum is σ = 1864114560. Its totient is φ = 385799232.

The previous prime is 1000021193. The next prime is 1000021229. The reversal of 1000021210 is 121200001.

It is a junction number, because it is equal to n+sod(n) for n = 1000021193 and 1000021202.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 534697 + ... + 536563.

It is an arithmetic number, because the mean of its divisors is an integer number (58253580).

Almost surely, 2^1000021210 is an apocalyptic number.

1000021210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1000021210 is a deficient number, since it is larger than the sum of its proper divisors (864093350).

1000021210 is a wasteful number, since it uses less digits than its factorization.

1000021210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3750.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 1000021210 is about 31623.1119594514. Note that the first 3 decimals coincide. The cubic root of 1000021210 is about 1000.0070699500.

Adding to 1000021210 its reverse (121200001), we get a palindrome (1121221211).

The spelling of 1000021210 in words is "one billion, twenty-one thousand, two hundred ten".