21201201010 has 64 divisors (see below), whose sum is σ = 43703193600. Its totient is φ = 7334308800.

The previous prime is 21201200987. The next prime is 21201201061. The reversal of 21201201010 is 1010210212.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 148501 + ... + 253879.

It is an arithmetic number, because the mean of its divisors is an integer number (682862400).

Almost surely, 2^21201201010 is an apocalyptic number.

21201201010 is an abundant number, since it is smaller than the sum of its proper divisors (22501992590).

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

21201201010 is a wasteful number, since it uses less digits than its factorization.

21201201010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105487.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21201201010 its reverse (1010210212), we get a palindrome (22211411222).

The spelling of 21201201010 in words is "twenty-one billion, two hundred one million, two hundred one thousand, ten".