21201101010122 has 16 divisors (see below), whose sum is σ = 34728439626144. Its totient is φ = 9626939406000.

The previous prime is 21201101010121. The next prime is 21201101010137. The reversal of 21201101010122 is 22101010110212.

It is a junction number, because it is equal to n+sod(n) for n = 21201101010097 and 21201101010106.

It is not an unprimeable number, because it can be changed into a prime (21201101010121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 496212629 + ... + 496255352.

It is an arithmetic number, because the mean of its divisors is an integer number (2170527476634).

Almost surely, 2^{21201101010122} is an apocalyptic number.

21201101010122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21201101010122 is a deficient number, since it is larger than the sum of its proper divisors (13527338616022).

21201101010122 is a wasteful number, since it uses less digits than its factorization.

21201101010122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992468965.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21201101010122 its reverse (22101010110212), we get a palindrome (43302111120334).

The spelling of 21201101010122 in words is "twenty-one trillion, two hundred one billion, one hundred one million, ten thousand, one hundred twenty-two".