21101220101102 has 8 divisors (see below), whose sum is σ = 31651859858376. Its totient is φ = 10550600148312.

The previous prime is 21101220100981. The next prime is 21101220101107. The reversal of 21101220101102 is 20110102210112.

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

It is a super-2 number, since 2×21101220101102² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101220101107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1915088 + ... + 6772739.

It is an arithmetic number, because the mean of its divisors is an integer number (3956482482297).

Almost surely, 2^{21101220101102} is an apocalyptic number.

21101220101102 is a deficient number, since it is larger than the sum of its proper divisors (10550639757274).

21101220101102 is a wasteful number, since it uses less digits than its factorization.

21101220101102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9902242.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21101220101102 its reverse (20110102210112), we get a palindrome (41211322311214).

The spelling of 21101220101102 in words is "twenty-one trillion, one hundred one billion, two hundred twenty million, one hundred one thousand, one hundred two".