21121102001002 has 16 divisors (see below), whose sum is σ = 32220023260320. Its totient is φ = 10381109726448.

The previous prime is 21121102000997. The next prime is 21121102001029. The reversal of 21121102001002 is 20010020112112.

It is a super-2 number, since 2×21121102001002² (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 7 ways as a sum of consecutive naturals, for example, 1120848 + ... + 6595339.

It is an arithmetic number, because the mean of its divisors is an integer number (2013751453770).

Almost surely, 2^{21121102001002} is an apocalyptic number.

21121102001002 is a deficient number, since it is larger than the sum of its proper divisors (11098921259318).

21121102001002 is a wasteful number, since it uses less digits than its factorization.

21121102001002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7739445.

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

Adding to 21121102001002 its reverse (20010020112112), we get a palindrome (41131122113114).

The spelling of 21121102001002 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred two million, one thousand, two".