212100021002 has 16 divisors (see below), whose sum is σ = 321465170880. Its totient is φ = 104950559808.

The previous prime is 212100020999. The next prime is 212100021011. The reversal of 212100021002 is 200120001212.

It is a happy number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1322927 + ... + 1474562.

It is an arithmetic number, because the mean of its divisors is an integer number (20091573180).

Almost surely, 2^212100021002 is an apocalyptic number.

212100021002 is a deficient number, since it is larger than the sum of its proper divisors (109365149878).

212100021002 is a wasteful number, since it uses less digits than its factorization.

212100021002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2797885.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 212100021002 its reverse (200120001212), we get a palindrome (412220022214).

The spelling of 212100021002 in words is "two hundred twelve billion, one hundred million, twenty-one thousand, two".