21202210121012 has 24 divisors (see below), whose sum is σ = 38755964956800. Its totient is φ = 10136175438816.

The previous prime is 21202210121009. The next prime is 21202210121047. The reversal of 21202210121012 is 21012101220212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 887258312 + ... + 887282207.

It is an arithmetic number, because the mean of its divisors is an integer number (1614831873200).

Almost surely, 2^{21202210121012} is an apocalyptic number.

It is an amenable number.

21202210121012 is a deficient number, since it is larger than the sum of its proper divisors (17553754835788).

21202210121012 is a wasteful number, since it uses less digits than its factorization.

21202210121012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1774540655 (or 1774540653 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21202210121012 its reverse (21012101220212), we get a palindrome (42214311341224).

The spelling of 21202210121012 in words is "twenty-one trillion, two hundred two billion, two hundred ten million, one hundred twenty-one thousand, twelve".