20021210012122 has 64 divisors (see below), whose sum is σ = 34536882290688. Its totient is φ = 8620759368000.

The previous prime is 20021210012117. The next prime is 20021210012131. The reversal of 20021210012122 is 22121001212002.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20021210012096 and 20021210012105.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14936353 + ... + 16221499.

It is an arithmetic number, because the mean of its divisors is an integer number (539638785792).

Almost surely, 2^{20021210012122} is an apocalyptic number.

20021210012122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20021210012122 is a deficient number, since it is larger than the sum of its proper divisors (14515672278566).

20021210012122 is a wasteful number, since it uses less digits than its factorization.

20021210012122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285675.

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

Adding to 20021210012122 its reverse (22121001212002), we get a palindrome (42142211224124).

The spelling of 20021210012122 in words is "twenty trillion, twenty-one billion, two hundred ten million, twelve thousand, one hundred twenty-two".