21021123311302 has 4 divisors (see below), whose sum is σ = 31531684966956. Its totient is φ = 10510561655650.

The previous prime is 21021123311281. The next prime is 21021123311351. The reversal of 21021123311302 is 20311332112012.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×21021123311302² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5255280827824 + ... + 5255280827827.

It is an arithmetic number, because the mean of its divisors is an integer number (7882921241739).

Almost surely, 2^{21021123311302} is an apocalyptic number.

21021123311302 is a deficient number, since it is larger than the sum of its proper divisors (10510561655654).

21021123311302 is a wasteful number, since it uses less digits than its factorization.

21021123311302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10510561655653.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21021123311302 its reverse (20311332112012), we get a palindrome (41332455423314).

The spelling of 21021123311302 in words is "twenty-one trillion, twenty-one billion, one hundred twenty-three million, three hundred eleven thousand, three hundred two".