20102021210121 has 8 divisors (see below), whose sum is σ = 26825583674784. Its totient is φ = 13389903109440.

The previous prime is 20102021210077. The next prime is 20102021210123. The reversal of 20102021210121 is 12101212020102.

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

It is not a de Polignac number, because 20102021210121 - 2⁹ = 20102021209609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20102021210121.

It is not an unprimeable number, because it can be changed into a prime (20102021210123) 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, 2861086896 + ... + 2861093921.

It is an arithmetic number, because the mean of its divisors is an integer number (3353197959348).

Almost surely, 2^{20102021210121} is an apocalyptic number.

It is an amenable number.

20102021210121 is a deficient number, since it is larger than the sum of its proper divisors (6723562464663).

20102021210121 is a wasteful number, since it uses less digits than its factorization.

20102021210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5722181991.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20102021210121 its reverse (12101212020102), we get a palindrome (32203233230223).

The spelling of 20102021210121 in words is "twenty trillion, one hundred two billion, twenty-one million, two hundred ten thousand, one hundred twenty-one".