210021210020122 has 8 divisors (see below), whose sum is σ = 315037215411156. Its totient is φ = 105008804883072.

The previous prime is 210021210020117. The next prime is 210021210020147. The reversal of 210021210020122 is 221020012120012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 154148141440881 + 55873068579241 = 12415641^2 + 7474829^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 210021210020096 and 210021210020105.

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, 899917653 + ... + 900151000.

Almost surely, 2^{210021210020122} is an apocalyptic number.

210021210020122 is a deficient number, since it is larger than the sum of its proper divisors (105016005391034).

210021210020122 is a wasteful number, since it uses less digits than its factorization.

210021210020122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1800126992.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 210021210020122 its reverse (221020012120012), we get a palindrome (431041222140134).

The spelling of 210021210020122 in words is "two hundred ten trillion, twenty-one billion, two hundred ten million, twenty thousand, one hundred twenty-two".