21000200101002 has 40 divisors (see below), whose sum is σ = 47056378426596. Its totient is φ = 7000010990208.

The previous prime is 21000200100973. The next prime is 21000200101021. The reversal of 21000200101002 is 20010100200012.

It can be written as a sum of positive squares in 2 ways, for example, as 20437623598401 + 562576502601 = 4520799^2 + 750051^2 .

It is a super-2 number, since 2×21000200101002² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 23280178 + ... + 24165410.

Almost surely, 2^{21000200101002} is an apocalyptic number.

21000200101002 is an abundant number, since it is smaller than the sum of its proper divisors (26056178325594).

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

21000200101002 is a wasteful number, since it uses less digits than its factorization.

21000200101002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031684 (or 1031675 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 21000200101002 its reverse (20010100200012), we get a palindrome (41010300301014).

The spelling of 21000200101002 in words is "twenty-one trillion, two hundred million, one hundred one thousand, two".