1011222212121 has 80 divisors (see below), whose sum is σ = 1662765907968. Its totient is φ = 607350895200.

The previous prime is 1011222212041. The next prime is 1011222212131. The reversal of 1011222212121 is 1212122221101.

It is not a de Polignac number, because 1011222212121 - 2⁹ = 1011222211609 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1011222212094 and 1011222212103.

It is not an unprimeable number, because it can be changed into a prime (1011222212131) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 111228786 + ... + 111237876.

Almost surely, 2^{1011222212121} is an apocalyptic number.

1011222212121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1011222212121 is a deficient number, since it is larger than the sum of its proper divisors (651543695847).

1011222212121 is a wasteful number, since it uses less digits than its factorization.

1011222212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10224 (or 10215 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1011222212121 its reverse (1212122221101), we get a palindrome (2223344433222).

The spelling of 1011222212121 in words is "one trillion, eleven billion, two hundred twenty-two million, two hundred twelve thousand, one hundred twenty-one".