21101001201010 has 8 divisors (see below), whose sum is σ = 37981802161836. Its totient is φ = 8440400480400.

The previous prime is 21101001200989. The next prime is 21101001201013. The reversal of 21101001201010 is 1010210010112.

It can be written as a sum of positive squares in 2 ways, for example, as 20485735097689 + 615266103321 = 4526117^2 + 784389^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (10), and also a Moran number because the ratio is a prime number: 2110100120101 = 21101001201010 / (2 + 1 + 1 + 0 + 1 + 0 + 0 + 1 + 2 + 0 + 1 + 0 + 1 + 0).

It is not an unprimeable number, because it can be changed into a prime (21101001201013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1055050060041 + ... + 1055050060060.

Almost surely, 2^{21101001201010} is an apocalyptic number.

21101001201010 is a deficient number, since it is larger than the sum of its proper divisors (16880800960826).

21101001201010 is a wasteful number, since it uses less digits than its factorization.

21101001201010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2110100120108.

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

Adding to 21101001201010 its reverse (1010210010112), we get a palindrome (22111211211122).

The spelling of 21101001201010 in words is "twenty-one trillion, one hundred one billion, one million, two hundred one thousand, ten".