21220314551445 has 8 divisors (see below), whose sum is σ = 33952503282336. Its totient is φ = 11317501094096.

The previous prime is 21220314551437. The next prime is 21220314551453. The reversal of 21220314551445 is 54415541302212.

It is an interprime number because it is at equal distance from previous prime (21220314551437) and next prime (21220314551453).

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

It is a cyclic number.

It is not a de Polignac number, because 21220314551445 - 2³ = 21220314551437 is a prime.

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, 707343818367 + ... + 707343818396.

It is an arithmetic number, because the mean of its divisors is an integer number (4244062910292).

Almost surely, 2^{21220314551445} is an apocalyptic number.

It is an amenable number.

21220314551445 is a deficient number, since it is larger than the sum of its proper divisors (12732188730891).

21220314551445 is a wasteful number, since it uses less digits than its factorization.

21220314551445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1414687636771.

The product of its (nonzero) digits is 192000, while the sum is 39.

Adding to 21220314551445 its reverse (54415541302212), we get a palindrome (75635855853657).

The spelling of 21220314551445 in words is "twenty-one trillion, two hundred twenty billion, three hundred fourteen million, five hundred fifty-one thousand, four hundred forty-five".