21121421150244 has 24 divisors (see below), whose sum is σ = 49314766805248. Its totient is φ = 7035980747040.

The previous prime is 21121421150239. The next prime is 21121421150287. The reversal of 21121421150244 is 44205112412112.

It is a happy number.

It is a super-2 number, since 2×21121421150244² (a number of 27 digits) contains 22 as substring.

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, 561601627 + ... + 561639234.

Almost surely, 2^{21121421150244} is an apocalyptic number.

It is an amenable number.

21121421150244 is an abundant number, since it is smaller than the sum of its proper divisors (28193345655004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21121421150244 is a wasteful number, since it uses less digits than its factorization.

21121421150244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1123242435 (or 1123242433 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 30.

Adding to 21121421150244 its reverse (44205112412112), we get a palindrome (65326533562356).

The spelling of 21121421150244 in words is "twenty-one trillion, one hundred twenty-one billion, four hundred twenty-one million, one hundred fifty thousand, two hundred forty-four".