21112120001002 has 8 divisors (see below), whose sum is σ = 32440574635812. Its totient is φ = 10298595122400.

The previous prime is 21112120000987. The next prime is 21112120001029. The reversal of 21112120001002 is 20010002121112.

It can be written as a sum of positive squares in 2 ways, for example, as 19535259656641 + 1576860344361 = 4419871^2 + 1255731^2 .

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

It is a super-2 number, since 2×21112120001002² (a number of 27 digits) contains 22 as substring.

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, 128732438949 + ... + 128732439112.

Almost surely, 2^{21112120001002} is an apocalyptic number.

21112120001002 is a deficient number, since it is larger than the sum of its proper divisors (11328454634810).

21112120001002 is a wasteful number, since it uses less digits than its factorization.

21112120001002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257464878104.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21112120001002 its reverse (20010002121112), we get a palindrome (41122122122114).

The spelling of 21112120001002 in words is "twenty-one trillion, one hundred twelve billion, one hundred twenty million, one thousand, two".