21010122201002 has 12 divisors (see below), whose sum is σ = 34640656026018. Its totient is φ = 9550055545800.

The previous prime is 21010122201001. The next prime is 21010122201017. The reversal of 21010122201002 is 20010222101012.

It can be written as a sum of positive squares in only one way, i.e., 12063389151121 + 8946733049881 = 3473239^2 + 2991109^2 .

It is not an unprimeable number, because it can be changed into a prime (21010122201001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43409343149 + ... + 43409343632.

Almost surely, 2^{21010122201002} is an apocalyptic number.

21010122201002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21010122201002 is a deficient number, since it is larger than the sum of its proper divisors (13630533825016).

21010122201002 is a wasteful number, since it uses less digits than its factorization.

21010122201002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86818686805 (or 86818686794 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21010122201002 its reverse (20010222101012), we get a palindrome (41020344302014).

The spelling of 21010122201002 in words is "twenty-one trillion, ten billion, one hundred twenty-two million, two hundred one thousand, two".