21010101010002 has 96 divisors (see below), whose sum is σ = 51908770892160. Its totient is φ = 6084201715200.

The previous prime is 21010101009973. The next prime is 21010101010051. The reversal of 21010101010002 is 20001010101012.

It is a happy number.

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 47 ways as a sum of consecutive naturals, for example, 232472899 + ... + 232563257.

It is an arithmetic number, because the mean of its divisors is an integer number (540716363460).

Almost surely, 2^{21010101010002} is an apocalyptic number.

21010101010002 is an abundant number, since it is smaller than the sum of its proper divisors (30898669882158).

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

21010101010002 is a wasteful number, since it uses less digits than its factorization.

21010101010002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148848 (or 148845 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 21010101010002 its reverse (20001010101012), we get a palindrome (41011111111014).

It can be divided in two parts, 210101010 and 10002, that added together give a palindrome (210111012).

The spelling of 21010101010002 in words is "twenty-one trillion, ten billion, one hundred one million, ten thousand, two".