21012022220003 has 8 divisors (see below), whose sum is σ = 22257502914672. Its totient is φ = 19767594790656.

The previous prime is 21012022219957. The next prime is 21012022220009. The reversal of 21012022220003 is 30002222021012.

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

It is not a de Polignac number, because 21012022220003 - 2¹⁸ = 21012021957859 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21012022220009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263275250 + ... + 263355047.

It is an arithmetic number, because the mean of its divisors is an integer number (2782187864334).

Almost surely, 2^{21012022220003} is an apocalyptic number.

21012022220003 is a deficient number, since it is larger than the sum of its proper divisors (1245480694669).

21012022220003 is a wasteful number, since it uses less digits than its factorization.

21012022220003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526632661.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21012022220003 its reverse (30002222021012), we get a palindrome (51014244241015).

The spelling of 21012022220003 in words is "twenty-one trillion, twelve billion, twenty-two million, two hundred twenty thousand, three".