21211020020010 has 32 divisors (see below), whose sum is σ = 51356947596480. Its totient is φ = 5606216499968.

The previous prime is 21211020019999. The next prime is 21211020020011. The reversal of 21211020020010 is 1002002011212.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21211020020011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3128465640 + ... + 3128472419.

It is an arithmetic number, because the mean of its divisors is an integer number (1604904612390).

Almost surely, 2^{21211020020010} is an apocalyptic number.

21211020020010 is an abundant number, since it is smaller than the sum of its proper divisors (30145927576470).

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

21211020020010 is a wasteful number, since it uses less digits than its factorization.

21211020020010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6256938182.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21211020020010 its reverse (1002002011212), we get a palindrome (22213022031222).

The spelling of 21211020020010 in words is "twenty-one trillion, two hundred eleven billion, twenty million, twenty thousand, ten".