21020312002101 has 32 divisors (see below), whose sum is σ = 29987249760000. Its totient is φ = 13067579526144.

The previous prime is 21020312002097. The next prime is 21020312002127. The reversal of 21020312002101 is 10120021302012.

It is not a de Polignac number, because 21020312002101 - 2² = 21020312002097 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020312002201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17731476 + ... + 18879773.

It is an arithmetic number, because the mean of its divisors is an integer number (937101555000).

Almost surely, 2^{21020312002101} is an apocalyptic number.

It is an amenable number.

21020312002101 is a deficient number, since it is larger than the sum of its proper divisors (8966937757899).

21020312002101 is a wasteful number, since it uses less digits than its factorization.

21020312002101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36611485.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21020312002101 its reverse (10120021302012), we get a palindrome (31140333304113).

The spelling of 21020312002101 in words is "twenty-one trillion, twenty billion, three hundred twelve million, two thousand, one hundred one".