21122501003 has 8 divisors (see below), whose sum is σ = 22698808272. Its totient is φ = 19583283456.

The previous prime is 21122500999. The next prime is 21122501009. The reversal of 21122501003 is 30010522112.

It is a happy number.

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 21122501003 - 2² = 21122500999 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (21122501009) 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, 9271250 + ... + 9273527.

It is an arithmetic number, because the mean of its divisors is an integer number (2837351034).

Almost surely, 2^21122501003 is an apocalyptic number.

21122501003 is a deficient number, since it is larger than the sum of its proper divisors (1576307269).

21122501003 is a wasteful number, since it uses less digits than its factorization.

21122501003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18544861.

The product of its (nonzero) digits is 120, while the sum is 17.

The spelling of 21122501003 in words is "twenty-one billion, one hundred twenty-two million, five hundred one thousand, three".