21121012011022 has 64 divisors (see below), whose sum is σ = 40286789222400. Its totient is φ = 8066349139680.

The previous prime is 21121012010977. The next prime is 21121012011037. The reversal of 21121012011022 is 22011021012112.

It is a junction number, because it is equal to n+sod(n) for n = 21121012010987 and 21121012011005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4553778 + ... + 7935925.

It is an arithmetic number, because the mean of its divisors is an integer number (629481081600).

Almost surely, 2^{21121012011022} is an apocalyptic number.

21121012011022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21121012011022 is a deficient number, since it is larger than the sum of its proper divisors (19165777211378).

21121012011022 is a wasteful number, since it uses less digits than its factorization.

21121012011022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12489941.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21121012011022 its reverse (22011021012112), we get a palindrome (43132033023134).

The spelling of 21121012011022 in words is "twenty-one trillion, one hundred twenty-one billion, twelve million, eleven thousand, twenty-two".