21002220122102 has 8 divisors (see below), whose sum is σ = 32037284932200. Its totient is φ = 10323125144704.

The previous prime is 21002220122099. The next prime is 21002220122131. The reversal of 21002220122102 is 20122102220012.

It is a happy number.

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

It is a super-2 number, since 2×21002220122102² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 88992458027 + ... + 88992458262.

It is an arithmetic number, because the mean of its divisors is an integer number (4004660616525).

Almost surely, 2^{21002220122102} is an apocalyptic number.

21002220122102 is a deficient number, since it is larger than the sum of its proper divisors (11035064810098).

21002220122102 is a wasteful number, since it uses less digits than its factorization.

21002220122102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177984916350.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21002220122102 its reverse (20122102220012), we get a palindrome (41124322342114).

The spelling of 21002220122102 in words is "twenty-one trillion, two billion, two hundred twenty million, one hundred twenty-two thousand, one hundred two".