21001201101010 has 32 divisors (see below), whose sum is σ = 40710228410880. Its totient is φ = 7754250053568.

The previous prime is 21001201100993. The next prime is 21001201101011. The reversal of 21001201101010 is 1010110210012.

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

It is not an unprimeable number, because it can be changed into a prime (21001201101011) 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, 41387211 + ... + 41891569.

It is an arithmetic number, because the mean of its divisors is an integer number (1272194637840).

Almost surely, 2^{21001201101010} is an apocalyptic number.

21001201101010 is a deficient number, since it is larger than the sum of its proper divisors (19709027309870).

21001201101010 is a wasteful number, since it uses less digits than its factorization.

21001201101010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824682.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 21001201101010 its reverse (1010110210012), we get a palindrome (22011311311022).

The spelling of 21001201101010 in words is "twenty-one trillion, one billion, two hundred one million, one hundred one thousand, ten".