1021200212122 has 16 divisors (see below), whose sum is σ = 1593473666400. Its totient is φ = 490239048880.

The previous prime is 1021200212117. The next prime is 1021200212171. The reversal of 1021200212122 is 2212120021201.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1021200212096 and 1021200212105.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49170904 + ... + 49191667.

It is an arithmetic number, because the mean of its divisors is an integer number (99592104150).

Almost surely, 2^{1021200212122} is an apocalyptic number.

1021200212122 is a deficient number, since it is larger than the sum of its proper divisors (572273454278).

1021200212122 is a wasteful number, since it uses less digits than its factorization.

1021200212122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98362781.

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

Adding to 1021200212122 its reverse (2212120021201), we get a palindrome (3233320233323).

The spelling of 1021200212122 in words is "one trillion, twenty-one billion, two hundred million, two hundred twelve thousand, one hundred twenty-two".