21021102310122 has 48 divisors (see below), whose sum is σ = 46658813527872. Its totient is φ = 6835805471040.

The previous prime is 21021102310121. The next prime is 21021102310147. The reversal of 21021102310122 is 22101320112012.

21021102310122 is a `hidden beast` number, since 21 + 0 + 211 + 0 + 2 + 310 + 122 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21021102310095 and 21021102310104.

It is not an unprimeable number, because it can be changed into a prime (21021102310121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15086923 + ... + 16421249.

It is an arithmetic number, because the mean of its divisors is an integer number (972058615164).

Almost surely, 2^{21021102310122} is an apocalyptic number.

21021102310122 is an abundant number, since it is smaller than the sum of its proper divisors (25637711217750).

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

21021102310122 is a wasteful number, since it uses less digits than its factorization.

21021102310122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355723 (or 1355720 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 21021102310122 its reverse (22101320112012), we get a palindrome (43122422422134).

The spelling of 21021102310122 in words is "twenty-one trillion, twenty-one billion, one hundred two million, three hundred ten thousand, one hundred twenty-two".