21122121000101 has 4 divisors (see below), whose sum is σ = 23042313818304. Its totient is φ = 19201928181900.

The previous prime is 21122121000067. The next prime is 21122121000121. The reversal of 21122121000101 is 10100012122112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21122121000101 is a prime.

It is a super-2 number, since 2×21122121000101² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122121000121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 960096409085 + ... + 960096409106.

It is an arithmetic number, because the mean of its divisors is an integer number (5760578454576).

Almost surely, 2^{21122121000101} is an apocalyptic number.

It is an amenable number.

21122121000101 is a deficient number, since it is larger than the sum of its proper divisors (1920192818203).

21122121000101 is a wasteful number, since it uses less digits than its factorization.

21122121000101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1920192818202.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21122121000101 its reverse (10100012122112), we get a palindrome (31222133122213).

The spelling of 21122121000101 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred twenty-one million, one hundred one", and thus it is an aban number.