21001010122002 has 8 divisors (see below), whose sum is σ = 42002020244016. Its totient is φ = 7000336707332.

The previous prime is 21001010121953. The next prime is 21001010122139. The reversal of 21001010122002 is 20022101010012.

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

21001010122002 is an admirable number.

It is a super-2 number, since 2×21001010122002² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1750084176828 + ... + 1750084176839.

It is an arithmetic number, because the mean of its divisors is an integer number (5250252530502).

Almost surely, 2^{21001010122002} is an apocalyptic number.

21001010122002 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21001010122002 is a wasteful number, since it uses less digits than its factorization.

21001010122002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3500168353672.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21001010122002 its reverse (20022101010012), we get a palindrome (41023111132014).

The spelling of 21001010122002 in words is "twenty-one trillion, one billion, ten million, one hundred twenty-two thousand, two".