21201001211010 has 64 divisors (see below), whose sum is σ = 52283698134912. Its totient is φ = 5498053456896.

The previous prime is 21201001210999. The next prime is 21201001211011. The reversal of 21201001211010 is 1011210010212.

It is not an unprimeable number, because it can be changed into a prime (21201001211011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2544519 + ... + 6991178.

It is an arithmetic number, because the mean of its divisors is an integer number (816932783358).

Almost surely, 2^{21201001211010} is an apocalyptic number.

21201001211010 is an abundant number, since it is smaller than the sum of its proper divisors (31082696923902).

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

21201001211010 is a wasteful number, since it uses less digits than its factorization.

21201001211010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9537747.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21201001211010 its reverse (1011210010212), we get a palindrome (22212211221222).

The spelling of 21201001211010 in words is "twenty-one trillion, two hundred one billion, one million, two hundred eleven thousand, ten".