21202110101121 has 8 divisors (see below), whose sum is σ = 29033520138624. Its totient is φ = 13752720065520.

The previous prime is 21202110101113. The next prime is 21202110101131. The reversal of 21202110101121 is 12110101120212.

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 21202110101121 - 2³ = 21202110101113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21202110101121.

It is not an unprimeable number, because it can be changed into a prime (21202110101131) 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, 95505000345 + ... + 95505000566.

It is an arithmetic number, because the mean of its divisors is an integer number (3629190017328).

Almost surely, 2^{21202110101121} is an apocalyptic number.

It is an amenable number.

21202110101121 is a deficient number, since it is larger than the sum of its proper divisors (7831410037503).

21202110101121 is a wasteful number, since it uses less digits than its factorization.

21202110101121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191010000951.

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

Adding to 21202110101121 its reverse (12110101120212), we get a palindrome (33312211221333).

The spelling of 21202110101121 in words is "twenty-one trillion, two hundred two billion, one hundred ten million, one hundred one thousand, one hundred twenty-one".