1021223212122 has 32 divisors (see below), whose sum is σ = 2108390860800. Its totient is φ = 329417613360.

The previous prime is 1021223212111. The next prime is 1021223212123. The reversal of 1021223212122 is 2212123221201.

It is not an unprimeable number, because it can be changed into a prime (1021223212123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10422853 + ... + 10520375.

It is an arithmetic number, because the mean of its divisors is an integer number (65887214400).

Almost surely, 2^{1021223212122} is an apocalyptic number.

1021223212122 is an abundant number, since it is smaller than the sum of its proper divisors (1087167648678).

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

1021223212122 is a wasteful number, since it uses less digits than its factorization.

1021223212122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153858.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 1021223212122 its reverse (2212123221201), we get a palindrome (3233346433323).

The spelling of 1021223212122 in words is "one trillion, twenty-one billion, two hundred twenty-three million, two hundred twelve thousand, one hundred twenty-two".