21201021010010 has 16 divisors (see below), whose sum is σ = 38182278043296. Its totient is φ = 8475866131728.

The previous prime is 21201021009977. The next prime is 21201021010051. The reversal of 21201021010010 is 1001012010212.

It is a junction number, because it is equal to n+sod(n) for n = 21201021009973 and 21201021010000.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 567764432 + ... + 567801771.

It is an arithmetic number, because the mean of its divisors is an integer number (2386392377706).

Almost surely, 2^{21201021010010} is an apocalyptic number.

21201021010010 is a deficient number, since it is larger than the sum of its proper divisors (16981257033286).

21201021010010 is a wasteful number, since it uses less digits than its factorization.

21201021010010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135568077.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21201021010010 its reverse (1001012010212), we get a palindrome (22202033020222).

The spelling of 21201021010010 in words is "twenty-one trillion, two hundred one billion, twenty-one million, ten thousand, ten".