21201211010 has 16 divisors (see below), whose sum is σ = 43613919936. Its totient is φ = 7268986608.

The previous prime is 21201211001. The next prime is 21201211063. The reversal of 21201211010 is 1011210212.

It is a junction number, because it is equal to n+sod(n) for n = 21201210982 and 21201211000.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151437152 + ... + 151437291.

It is an arithmetic number, because the mean of its divisors is an integer number (2725869996).

Almost surely, 2^21201211010 is an apocalyptic number.

21201211010 is an abundant number, since it is smaller than the sum of its proper divisors (22412708926).

21201211010 is a wasteful number, since it uses less digits than its factorization.

21201211010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302874457.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21201211010 its reverse (1011210212), we get a palindrome (22212421222).

The spelling of 21201211010 in words is "twenty-one billion, two hundred one million, two hundred eleven thousand, ten".