21121022011101 has 8 divisors (see below), whose sum is σ = 28161391811904. Its totient is φ = 14080666775520.

The previous prime is 21121022011093. The next prime is 21121022011123. The reversal of 21121022011101 is 10111022012112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21121022011101 - 2³ = 21121022011093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21121022011171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 375160 + ... + 6510206.

It is an arithmetic number, because the mean of its divisors is an integer number (3520173976488).

Almost surely, 2^{21121022011101} is an apocalyptic number.

It is an amenable number.

21121022011101 is a deficient number, since it is larger than the sum of its proper divisors (7040369800803).

21121022011101 is a wasteful number, since it uses less digits than its factorization.

21121022011101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7282611.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21121022011101 its reverse (10111022012112), we get a palindrome (31232044023213).

The spelling of 21121022011101 in words is "twenty-one trillion, one hundred twenty-one billion, twenty-two million, eleven thousand, one hundred one".