21121122022012 has 6 divisors (see below), whose sum is σ = 36961963538528. Its totient is φ = 10560561011004.

The previous prime is 21121122021997. The next prime is 21121122022069. The reversal of 21121122022012 is 21022022112112.

It is a super-2 number, since 2×21121122022012² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2640140252748 + ... + 2640140252755.

Almost surely, 2^{21121122022012} is an apocalyptic number.

It is an amenable number.

21121122022012 is a deficient number, since it is larger than the sum of its proper divisors (15840841516516).

21121122022012 is a wasteful number, since it uses less digits than its factorization.

21121122022012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5280280505507 (or 5280280505505 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21121122022012 its reverse (21022022112112), we get a palindrome (42143144134124).

The spelling of 21121122022012 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred twenty-two million, twenty-two thousand, twelve".