1021111122122 has 64 divisors (see below), whose sum is σ = 1985679360000. Its totient is φ = 382437961920.

The previous prime is 1021111122113. The next prime is 1021111122127. The reversal of 1021111122122 is 2212211111201.

It is a self number, because there is not a number n which added to its sum of digits gives 1021111122122.

It is not an unprimeable number, because it can be changed into a prime (1021111122127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5085047 + ... + 5282037.

It is an arithmetic number, because the mean of its divisors is an integer number (31026240000).

Almost surely, 2^{1021111122122} is an apocalyptic number.

1021111122122 is a deficient number, since it is larger than the sum of its proper divisors (964568237878).

1021111122122 is a wasteful number, since it uses less digits than its factorization.

1021111122122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198531.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1021111122122 its reverse (2212211111201), we get a palindrome (3233322233323).

The spelling of 1021111122122 in words is "one trillion, twenty-one billion, one hundred eleven million, one hundred twenty-two thousand, one hundred twenty-two".