21023001021212 has 24 divisors (see below), whose sum is σ = 36824886811440. Its totient is φ = 10501605365120.

The previous prime is 21023001021173. The next prime is 21023001021223. The reversal of 21023001021212 is 21212010032012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 236113262 + ... + 236202282.

It is an arithmetic number, because the mean of its divisors is an integer number (1534370283810).

Almost surely, 2^{21023001021212} is an apocalyptic number.

It is an amenable number.

21023001021212 is a deficient number, since it is larger than the sum of its proper divisors (15801885790228).

21023001021212 is a wasteful number, since it uses less digits than its factorization.

21023001021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143941 (or 143939 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21023001021212 its reverse (21212010032012), we get a palindrome (42235011053224).

The spelling of 21023001021212 in words is "twenty-one trillion, twenty-three billion, one million, twenty-one thousand, two hundred twelve".