21021022121122 has 8 divisors (see below), whose sum is σ = 31531553150400. Its totient is φ = 10510504404324.

The previous prime is 21021022121101. The next prime is 21021022121131. The reversal of 21021022121122 is 22112122012012.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21021022121122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3111579 + ... + 7191937.

It is an arithmetic number, because the mean of its divisors is an integer number (3941444143800).

Almost surely, 2^{21021022121122} is an apocalyptic number.

21021022121122 is a deficient number, since it is larger than the sum of its proper divisors (10510531029278).

21021022121122 is a wasteful number, since it uses less digits than its factorization.

21021022121122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6656240.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21021022121122 its reverse (22112122012012), we get a palindrome (43133144133134).

It can be divided in two parts, 2102102 and 2121122, that added together give a palindrome (4223224).

The spelling of 21021022121122 in words is "twenty-one trillion, twenty-one billion, twenty-two million, one hundred twenty-one thousand, one hundred twenty-two".