21121233122 has 16 divisors (see below), whose sum is σ = 34564300992. Its totient is φ = 9599926320.

The previous prime is 21121233101. The next prime is 21121233151. The reversal of 21121233122 is 22133212112.

It is a super-2 number, since 2×21121233122² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21121233094 and 21121233103.

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, 530048 + ... + 568500.

It is an arithmetic number, because the mean of its divisors is an integer number (2160268812).

Almost surely, 2^21121233122 is an apocalyptic number.

21121233122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21121233122 is a deficient number, since it is larger than the sum of its proper divisors (13443067870).

21121233122 is a wasteful number, since it uses less digits than its factorization.

21121233122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63433.

The product of its digits is 288, while the sum is 20.

Adding to 21121233122 its reverse (22133212112), we get a palindrome (43254445234).

The spelling of 21121233122 in words is "twenty-one billion, one hundred twenty-one million, two hundred thirty-three thousand, one hundred twenty-two".