21011202210121 has 8 divisors (see below), whose sum is σ = 21041963792640. Its totient is φ = 20980461723312.

The previous prime is 21011202210083. The next prime is 21011202210127. The reversal of 21011202210121 is 12101220211012.

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

It is a cyclic number.

It is not a de Polignac number, because 21011202210121 - 2⁴³ = 12215109187913 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21011202210095 and 21011202210104.

It is not an unprimeable number, because it can be changed into a prime (21011202210127) 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, 3279931 + ... + 7265008.

It is an arithmetic number, because the mean of its divisors is an integer number (2630245474080).

Almost surely, 2^{21011202210121} is an apocalyptic number.

It is an amenable number.

21011202210121 is a deficient number, since it is larger than the sum of its proper divisors (30761582519).

21011202210121 is a wasteful number, since it uses less digits than its factorization.

21011202210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10547855.

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

Adding to 21011202210121 its reverse (12101220211012), we get a palindrome (33112422421133).

The spelling of 21011202210121 in words is "twenty-one trillion, eleven billion, two hundred two million, two hundred ten thousand, one hundred twenty-one".